yashsingh1/xdaforums huggingface dataset:
[Xiaomi Mi Mix 2 Guides, News, & Discussion] maxniper:
It is like that and I hat to install GCam on op too, but I can't access settings in GCam it fc, that's why I install the module in Magisk, I could change video recording to 4k ;)
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Hilus:
Oh I see :) for me there was no problem, I changed to 4K and it worked just fine :)
[Xiaomi Mi Mix 2 Guides, News, & Discussion] maxniper:
Thanks, I will try to flash all again and see where was my error, I prefer do not use modules :)
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Hilus:
Here is a link for the apk I downloaded, hope it helps

https://www.apkmirror.com/apk/google-inc/camera/
[Xiaomi Mi Mix 2 Guides, News, & Discussion] maxniper:
I understood now, I had downloaded the Gcam moded version that has portrait mode ;)
[Xiaomi Mi Mix 2 Guides, News, & Discussion] ICV:
searching is easy:

#97
[Xiaomi Mi Mix 2 Guides, News, & Discussion] t-shock:
I googled it and I couldnt find anything specific for the mi mix 2 or a 2018 version

Thanks though
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Bantryred:
Do we need to flash if we already flashed Beta 5 version? Anything new in it?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] CrazyBeaver2377:
It just changes the version information and device name for chiron. If you flashed the previous version your version information will be incorrect.
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
Samsung Gear is not working on P until Samsung fix it, there's a fix around but notification will not work and hardly working:D
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
Magisk module
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
Flashable ZIP
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
Once installed, you'll find it on the system bottom part:good:

---------- Post added at 01:47 PM ---------- Previous post was at 01:45 PM ----------

If anybody wants always on, I'll attached the frameworkres.apk, use root explorer attached it to System/Vendor/Overlay. Make sure you back up your framework.apk or just rename it, once installed change permission to 0644
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
Try it at your own RISK:laugh:
[Xiaomi Mi Mix 2 Guides, News, & Discussion] t-shock:
Thanks for the immediate response

But I aint gonna stick with P since the Gear app doesnt work well on that firmware yet
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
We'll wait for a couple of months to make the Gear work, lucky though I just got this watch last week, I'll be returning it, replace it with HUAWEI 2:cool:
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Bantryred:
So no forced reboots today, but not using it as intensively as yesterday, but still think that Beta 5 was smoother.
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Paulius86:
For me pie is better. No random soft reboots (maybe firmware downgrade was part), alao inatallwd pie lag fix(seems abit smoother), but maybe it is just a placebo. Also the light is blinking for notifications, it needa to be enabled in apps &notifications then press on notifications and you can find it.
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Bantryred:
What app is that "pie lag fix"?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] maxniper:
I have a LG urbane with more than 2 years old and is working great. Of course it user google wear app
[Xiaomi Mi Mix 2 Guides, News, & Discussion] palexis06:
Hi, for me pie is very good except for the battery dp5 was so much better , are you done a dirty flash or a clean flash ?

Thank you ;)
[Xiaomi Mi Mix 2 Guides, News, & Discussion] kickassdave:
Hey all, I've found testing out Android P to be good fun. Thanks a million for the guide as well, perfect and clear instructions.

If I wanted to install, say, Cardinal AOSP, what steps would be needed?

Would a full wipe be necessary? Or would wiping system, etc be fine (along with updating firmware etc)? I don't have my USB-C data stick with me, so just trying to find out if I can get another ROM on or if I have to wait till I'm home from my trip away.
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
Yup, I'm on Cardinal Aosp right now, you can try wiping everything including the vendor, except for the internal storage and try installing that way. If it wouldn't boot then format data is necessary
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Paulius86:
Hi, visit telegram t.me/PsemiGSI, there you can find it.

---------- Post added at 06:27 AM ---------- Previous post was at 06:15 AM ----------

I have done i a dirty flash (didn't format data) but i wiped system partition before flash. Also used the dirty flash instructions.
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Paulius86:
p.s i attached the file..
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Valaran:
no way it's a placebo ! Buttery smooth now !! Thanks ! Must be added on first post !
[Xiaomi Mi Mix 2 Guides, News, & Discussion] usb7:
Which vendor and boot images so y'all think performs best for the sGSI? ABC (in OP), LOS, PE?

I felt that I was getting micro studders with the ABC and LOS vendor. Even after lag fix. I suspect the it could have been the schedutil governor...
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Valaran:
i personnaly switched to ondemand with Kernel Adiutor (and to enable double tap to wake). It's clean and smooth with the fix. Maybe less battery friendly than schedutil. I've lost 4% on airplane mode during sleeptime.
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
I'm back from CARDINAL AOSP, used LOS 15.1 Treble, but lags a bit, if you follow the first post with the Vendor and Boot image from ABC mine was buttery smooth. If you used LOS try going on demand on EXKM set up with SKIZEAZ or Placeholder Kernel. My battery is great though:good:
[Xiaomi Mi Mix 2 Guides, News, & Discussion] CrazyBeaver2377:
This lagfix really shouldn't be necesarry for our device. The rom has always been buttery smooth for me without using lagfix.

If you really need it, you'll notice it right away (for instance on my mido).

I'm not adding it to the first post as long as other people are not reporting any lag, i still believe this fix isn't intended for our device.
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Valaran:
i understand your point of view. I was experiencing a strange visual effect, like all animation were running at 25fps instead of 60. Gone with the patch so imo it had an effect on my rom usage feeling.
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
Is for the first Beta RELEASED:D
[Xiaomi Mi Mix 2 Guides, News, & Discussion] CrazyBeaver2377:
ehm what?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
The LAGFIX is for the first Beta release.

Just use what CRAZYBEAVER posted and it'll be buttery smooth, been trying all the Treble Room but what he posted is instant buttery smooth even with the original Kernel. Been with PGSI since beta 3 on the Treble site, but his instructions was the one who's always been smooth to me
[Xiaomi Mi Mix 2 Guides, News, & Discussion] CrazyBeaver2377:
I don't really know what you are trying to say and point out, not really helping the discussion here tbh.

But the lagfix has been shared in the PsemiGSI telegram channel, which has been updated for newer releases.

As I said it really shouldn't be needed for our device so i'm not going to encourage people to flash it. For some older/slower devices it is needed (eg Mido).
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
I'm haven't check the telegram PGSI, only on XDA as what I read, they don't need it on 4,5 and PR1
[Xiaomi Mi Mix 2 Guides, News, & Discussion] CrazyBeaver2377:
I created this instructions and thread especially for our device, so people don't have to go through all the generic fixes..

Please stop soiling the thread with useless information as it doesn't add much to the discussion and might get people confused..
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
It wasn't me, just trying to justify your post that you don't need the LAGFIX, did you see Crazy Beaver all the time when I mentioned that it is not for this forum:highfive:

---------- Post added at 02:30 PM ---------- Previous post was at 02:28 PM ----------

It's VALARAN who posted that LAGFIX not me, I respect every developer who made effort to contribute to this DEVICE:D
[Xiaomi Mi Mix 2 Guides, News, & Discussion] CrazyBeaver2377:
Np i'm not mad or anything :cool:

Just don't want the discussion in the thread to create unnecessary confusion :)
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
:good:
[Xiaomi Mi Mix 2 Guides, News, & Discussion] usb7:
Is there a VOTLE fix for PR1?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Crix.Ful92:
Someone can share some screenshots about that build?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] usb7:
Also anyone getting an AdAway error "copy of host files failed"?

Solved this with enabling Systemless hosts in Magisk settings but I've never had to do this before...
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
VOLTE fix on the first post works, I'm in the US though and adaway, go to root explorer SYSTEM/ETC/Host change permission to 0666

---------- Post added at 01:56 AM ---------- Previous post was at 01:56 AM ----------

If you can't change permission on ROOT EXPLORER, go to TWRP and file manager be sure to tick SYSTEM
[Xiaomi Mi Mix 2 Guides, News, & Discussion] usb7:
Thanks mounting system in TWRP worked.

I flashed the VOLTE fix but it didn't work for Verizon or AT&T.
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
I am on T-Mobile, works, try going to the network and check if LTE is the chosen one:D
[Xiaomi Mi Mix 2 Guides, News, & Discussion] adhityays:
Can someone make video tutorial for mi mix 2 please ?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] palexis06:
Hi everyone,

I have problem , when I reboot my phone the battery level change lol before I have 30% after reboot 16% and I tried to reboot again I have 14% wtf ? Do you have this problem ?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] sathara:
turn off adaptive battery
[Xiaomi Mi Mix 2 Guides, News, & Discussion] palexis06:
Already try no change :/

thank you :)
[Xiaomi Mi Mix 2 Guides, News, & Discussion] kcpyn36:
Is firmware related, flash 8.4.19 firm
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Bantryred:
Any one with hotspot problems?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] usb7:
Works for me
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Bantryred:
Ok. I'm having problems, tried changing a few AP settings but no luck ☹️
[Xiaomi Mi Mix 2 Guides, News, & Discussion] maxniper:
Is fw 8.5.7 ok? Or is better flash fw 8.4.19?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] kcpyn36:
I think 8.4.19 is the only one without the battery drop issues
[Xiaomi Mi Mix 2 Guides, News, & Discussion] palexis06:
Perfect now everything works nice :)

Thank you very much
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Bantryred:
Network provider error!!!
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Shuyin10:
I dont understand anything for flash Android P, is the first post updated ? Or is better to wait a real rom (aosp for preference) ?

Thx
[Xiaomi Mi Mix 2 Guides, News, & Discussion] t-shock:
Bug that I found

When I plug my headphones for 2nd time, the sound won't come from my headphones not the phone itself

So I have to restart to be able to use the headphones
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Valaran:
i don't know if this will come as a oneshot package. But as far as android P will be officially available for Mi Mix 2, you can expect an official release of LOS when it will be available (maybe in 2 or 3 months).
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Zurk7:
But have you tested in online gaming? and daily use?

if you can awnser would be great!

thanks
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Valaran:
i'm not the voice of god but for me it's daily usable ! No issue, no lag. I've played Arena Of Valor high settings without issue, camera is great with arnova's one, rom is smooth, battery life is correct too. The only issue is the no 270° rotation which can be little tricky when you use the front camera. Oh and the notification led that i can't make it work. Other than that, i stick on it for the moment, it's quite stable.
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Zurk7:
thanks for the answer :)

i will test it.
[Xiaomi Mi Mix 2 Guides, News, & Discussion] frandavid100:
I installed Magisk and got a bootlop... Did that happen to anyone else?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Bantryred:
No, and 16.7 is what I use plus 5 or 6 modules
[Xiaomi Mi Mix 2 Guides, News, & Discussion] CrazyBeaver2377:
shouldn't be happening

Did you flash magisk after first boot and setup of google play services?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Bantryred:
So going back to my WiFi hotspot problem, I'm with Vodafone Ireland, I've 2 APN in my phone, I can edit one, and it's the active one, but according to Vodafone, my handset some times activates the second APN "Vodafone MISP" which is chargeable outside my data allowance, but I can't delete or edit this APN.... Anyone have an idea of how I may be able to edit this apn, or delete it. Thanks
[Xiaomi Mi Mix 2 Guides, News, & Discussion] frandavid100:
Not immediately after, but yeah, I flashed it at some point after I had done all that, and had been using the phone for a while.

Should I have done it immediately afterwards?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] CrazyBeaver2377:
No doing it after is the way to go

What Magisk version did you use? You should go with the latest official beta (16.7) as that one works with treble.

There have been some random crashes with magisk at reboot which may cause soft reboot (this is fixed by a force reboot). This has already been reported to Magisk
[Xiaomi Mi Mix 2 Guides, News, & Discussion] frandavid100:
That was the problem... I was using 16.4. Now it works fine :)

By the way, I've noticed that there's no camera app... and neither Gcam nor Lineageos' camera app work. What should I do here?

Also, double tap to wake doesn't work either. Is there a way to solve that?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
Install SKIZEAZ 35 kernel and activate DTW and STS using EXKM or kernel aduitor

---------- Post added at 02:15 PM ---------- Previous post was at 02:13 PM ----------

For camera, go to this website https://gist.github.com/ZeroInfinit...finishing-setup--persistent-notification-bugs
[Xiaomi Mi Mix 2 Guides, News, & Discussion] frandavid100:
Thanks, that worked beautifully!

I assume that's the fix for double tap to wake?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] sh4dow6oy:
it reboots from 5 in 5 min .... cant get it to work
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
Yup, just install thru TWRP and look for gestures on EXKM OR KERNEL ADIUTOR:D
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Bantryred:
Change font size to small
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Paulius86:
Can you share the source where you are downloading the skizeaz kernel? As i see, it already advanced from r24 to r35 in a week...
[Xiaomi Mi Mix 2 Guides, News, & Discussion] frandavid100:
Dumb questions probably, but... Where can I download SKIZEAZ 35 kernel? Also, what are EXKM and Kernel Adiutor?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] jackk11111:
Help!!!!
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Paulius86:
Just press ok and ignore. All is good :)
[Xiaomi Mi Mix 2 Guides, News, & Discussion] jackk11111:
But it's normal?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] sh4dow6oy:
can someone send me a twrp backup of frp fingerprint partition .... my fingerprint isnt working ... and this partion has 0mb
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Paulius86:
For this rom it is ok
[Xiaomi Mi Mix 2 Guides, News, & Discussion] jackk11111:
All ok....for now [emoji28]

Inviato dal mio Pixel XL utilizzando Tapatalk
[Xiaomi Mi Mix 2 Guides, News, & Discussion] frandavid100:
OK, I enabled it on Kernel Adiutor but it only works as long as I keep Kernel Adiutor installed. The same seems to happen with any other kernel-tweaking apps... Is there a way to keep it enabled for good, without having to keep an app installed just for that?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] :
no

---------- Post added at 08:54 PM ---------- Previous post was at 08:51 PM ----------

use rotation orientation manager from the play store, enable full sensor rotation, profit.

---------- Post added at 08:59 PM ---------- Previous post was at 08:54 PM ----------

fyi skizeaz isn't required for dt2w, just a kernel manager like kernel adiutor or exkm to keep it enabled at boot. these apps basically let you tweak cpu performance among other kernel specific things and can improve battery life and overall speed of the device
[Xiaomi Mi Mix 2 Guides, News, & Discussion] frandavid100:
Well, that sucks. Is there any chance for [MENTION=8873609]CrazyBeaver2377[/MENTION] to tweak the kernel to include double tap to wake?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
Elemenal X kernel Monitor that's an APP so you can tweak the kernel. And you can find the kernel on a TELEGRAM group just register and join
[Xiaomi Mi Mix 2 Guides, News, & Discussion] :
but the placeholder kernel included in this android pie port has dt2w support. keeping the kernel manager app installed may be a minor inconvenience but it does have it's usefulness
[Xiaomi Mi Mix 2 Guides, News, & Discussion] kushals60:
i tried everything reducing the dpi and font too (PR1)

but no luck

i installed magisk , substratium and lucky patcher
[Xiaomi Mi Mix 2 Guides, News, & Discussion] dancress:
Dumb question: Are the files in the OP now DP5 or final Pie?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Paulius86:
Can you post the group name or group link? I seem to not find it anyway...
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
SKIZEAZ KERNEL, if you're talking about the Elemental APP its on playstore :D
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Zurk7:
I cant find it too.....
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Paulius86:
I can't find such a group :) that is the case. :)
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
I don't know why you can't find it, on my side when I search SKIZEAZ on Telegram, it'll pop out:confused:
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
Here's the latest one
[Xiaomi Mi Mix 2 Guides, News, & Discussion] sathara:
how to solve the charging problem ?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Zurk7:
nope... dont find anything!

Im using telegram x, its that why i cant find?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
I'm not sure what's the difference between telegram and X? never tried X:eek:
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Paulius86:
So maybe you can post this groups address? Because it is different sometimes from what you see.. and you find it because you are in that group :)
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
I can't share you the link, cozz it's my telegram account-search for this

SKIZEAZ Kernel - Releases

;)
[Xiaomi Mi Mix 2 Guides, News, & Discussion] sathara:
anybody how to solve the charging problem.. my phone doesn't charge some times.. and restart will give different battery level.
[Xiaomi Mi Mix 2 Guides, News, & Discussion] CrazyBeaver2377:
Are you on 8.4.19 firmware?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] sathara:
no 8.7.19
[Xiaomi Mi Mix 2 Guides, News, & Discussion] CrazyBeaver2377:
Make sure you are on 8.4.19 firmware or older. All newer one causes random battery drops at reboot (and maybe also your other battery issues).
[Xiaomi Mi Mix 2 Guides, News, & Discussion] sathara:
how to check which firmware we are on
[Xiaomi Mi Mix 2 Guides, News, & Discussion] CrazyBeaver2377:
Just flash this and you'll be good :)

https://sourceforge.net/projects/xi...MIX2Global_8.4.19_fa49b22402_8.0.zip/download
[Xiaomi Mi Mix 2 Guides, News, & Discussion] sathara:
same i flashed. i am charging for 15 mins its stuck on 82 %.
[Xiaomi Mi Mix 2 Guides, News, & Discussion] :
https://telegram.org/blog/telegram-x
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Bantryred:
Minor bug to report, if using Bluetooth headphones as hands free set, no ring tone from phone or Bluetooth headphones.
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Valaran:
Hi !

After one week usage i'm happy of this rom ! My only last issue is random reboots happening more often than at start. I've installed the firmware provided by CrazyBeaver2377 this morning, hope it will fix this issue.

Love it so far !
[Xiaomi Mi Mix 2 Guides, News, & Discussion] maxniper:
I haven't had any reboots, but I have the firmware flashed
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Blurred00:
hi to all! i just found this amazing post only now!

I ve some question. i m now on LineageOS, the last version, magisk root 16.7 and TWRP 3.2.2.1.

Now i want to try this porting, then:

I ve a backup from Lineage and i ve read that i need to Format data and Wipe all partitions. how i can do if i don't want to missing this backup? ( just for secutiry)

I ve read also that there was out the stable pie version, for install this i need only to download the file in the first post and following the instruction? i need to update my TWRP ?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] maxniper:
You don't need to update TWRP or if you want update it later, follow exactly the OP guide and you will be good.
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Blurred00:
And for backup? if I need to wipe everything i will not missing it?

I'm worried about the fact that if i format all data and install this rom i will get bootloop. If this will be happeans i can not transfert file from my pc. I don t have one now.
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Valaran:
with no pc, no issue for backuping. Also as "internal memory format" is required, you need computer access to send back all zip, this is what i followed:

> backup your apps using titanium backup

> plug to computer and send all your "titanium backup" , your DCIM, Download, facebook, textra, everything you want on it

> reboot to recovery, be sure that your phone mtp is working

> do all the wipes (including internal memory)

> go back to mtp and send all zips needed (look carefully to the list, dont miss the play services apk etc)

> follow the procedure on the op.

> In the end (after two reboots), restore apps & datas :)

that's what i've done and it's all good.
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Blurred00:
thanks a lot for explain. i can take a macbook with android file transfert.

if i format all and i boot to twrp i can access to mtp ? because i remember when i install lineage i ve use a otg cable for transfert the zip files, no success with mac. but now i don t have the otg cable.

last question, instead of using titanium, I can use the twrp backup for restoring ? (in case of problems)
[Xiaomi Mi Mix 2 Guides, News, & Discussion] srdjan979:
was it possible to install some moded launcher?
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
Yup, but you will lost the gesture feature of the pie
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
Tried using Lawnchair V2, works smoothly, but problem on my side is my playstore stopped working, when I uninstall it it works again?

Gestures works though

---------- Post added at 06:48 AM ---------- Previous post was at 06:33 AM ----------

Dang, it's the icesound audio port that mess it up? not it's working normally
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Valaran:
you must test MTP before all wipe. If it works, it will after wipe. I've done it on windows 10, can't say on mac.

You can't use TWRP to backup. But you can use a TWRP backup with titanium to restore apps. I don't recommend it as it's longer than standard titanium backup files. TWRP is not able to save only apps&data.
[Xiaomi Mi Mix 2 Guides, News, & Discussion] Zurk7:
I think twrp backup dont work! When i do it and the i want to restore, gives me always the same error, cannot mount system, partition needs clean, and i have to wipe all again and the backup dont restores..... Sorry my english...
[Xiaomi Mi Mix 2 Guides, News, & Discussion] imna357:
True, been on and off with Pie, got a back up, but system will not mount(error).