Cannot open Soucetree on Catalina
Asked by rdhaene:

I downloaded Sourcetree from the website on my MacBook Pro, running Catalina, and when I attempt to launch it I get the error below. Does anyone know how to fix this issue?  

**"Sourcetree" can't be opened because Apple cannot check it for malicious software.**

**This software needs to be updated. Contact the developer for more information.**


Answers:
author: Anouk Hermsen
body: If you go to **System Preferences \> Security and Privacy \> General** you can click on allow apps downloaded from. Over the you will see that something is blocked from source tree, if you accept it it will open Sourcetree again

comments: author: Alexander Leruth
body: This worked for me. Thanks!


author: Joseph Pak
body: My company policy does not allow me to download from non-app store, non-verified. Am I SOL?


author: vanderheiden
body: In Mac OS you can also use the finder to go to the Applications directory. When you right-click the "SourceTree" App and select "Open" MAC OS will ask you if you want to open the app anyway. This only works when you right click the App directly!

Walter


author: suresh_Chouhan
body: Thanks its working for me.


author: Sof?a Pamela Recinos Dorst
body: Thanks Vanderheiden, that worked for me.


author: Ruben
body: It's easy to allow it to open, but is not the bigger question why Atlassian doesn't sign its app?

comments: author: alex.kent
body: technically, I think this problem is because Atlassian doesn't use Apple's service to "Notarize" the binary. But the question (and result) is the same.


author: Kristoffer Bakkejord
body: I can accept this from open source and hobby projects. But not if you are an Atlassian sized company, and this integrates into their paid producs.

First reaction to this is to suspect the release pipeline or downloaded zip to be compromised. I can't find any way to validate the download zip (e.g. SHA/MD5 on their website). Not good.


author: Justin Peckner
body: I was able to get Sourcetree 3.2.1 to run on Catalina: <https://www.sourcetreeapp.com/download-archives>

Hate to have to use a version that's now over a year old- wish that Atlassian would start signing the latest ones!


author: Marcos Jose Perez
body: 1. Open **Terminal**

2. Run this command:

```
xattr -d com.apple.quarantine /Applications/SourceTree.app
```

This does *not* require the user privileges to change System Preferences.

comments: author: Marcos Jose Perez
body: Thanks men, you safe my life to buy a licence of Fork.


author: morgue_ann
body: This takes the app out of quarantine \& lets it run, but with 10.15.4 (19E266) on a Mac w/ T2, I'm seeing SourceTreeLogin, a child process of ssh which is a child process of git which is launched by launchd.development, repeatedly get some errors

(CSSM Exception: -2147413737 CSSMERR_DL_DATASTORE_DOESNOT_EXIST)

then securityd reports

**\[com.apple.securityd:clientid\] code requirement check failed (-67050), client is not Apple-signed**

and it appears the process is killed, then a new one spawned every couple of seconds.

This uses over 100% of a CPU and hammers the network.


author: gsong
body: [@morgue_ann](/t5/user/viewprofilepage/user-id/3869498) I'm seeing the same thing. I've filed <https://jira.atlassian.com/browse/SRCTREE-7272> if you want to chime in there.


author: gsong
body: [@morgue_ann](/t5/user/viewprofilepage/user-id/3869498) I manage to work around the problem for now by removing \*all\* accounts from Sourcetree. This causes it to not try to log into those accounts, thus pegging seucrityd with requests.


author: antonio.vazquez
body: Same here


author: Kelly Woods
body: Many common apps like [Skype](https://www.minicreo.com/mac-uninstaller/app-cannot-be-opened-on-macos-catalina.html), WinZip and Sourcetree have such an issue on macOS Catalina. Usually you can bypass this new macOS gateway by opening the app through System Preferences \> Security \& Privacy \> Check Allow apps downloaded from App Store and identified developers \> Click Open Anyway (as mentioned by Anouk Hermsen).

![app-cannot-be-opened-on-macos-catalina-1.jpg](https://community.atlassian.com/t5/image/serverpage/image-id/73197i4B04C63FB204C2F0/image-dimensions/499x438?v=v2 "app-cannot-be-opened-on-macos-catalina-1.jpg")

If it still doesn't work, I assume that you are double clicking on the Sourcetree install icon, yes? Don't do that. Instead **right mouse click** or **control click** on it. You should get an Open option in context menu \> Select Open \> Then the next dialog box you see will be similar to the one you report, but it will also have the Open button added. Choose Open and voila.

![app-cannot-be-opened-on-macos-catalina-control-click-2.jpg](https://community.atlassian.com/t5/image/serverpage/image-id/73199i0ADD339222F83BD2/image-dimensions/476x408?v=v2 "app-cannot-be-opened-on-macos-catalina-control-click-2.jpg")

comments: author: David Welander(dw@live.se)
body: I don't have the open button, even when ctrl click or right click. I think it is a company policy. So means I can't use Sourcetree...


author: Nicolae Pop
body: Same problem, worked just fine in Mojave.


author: Joe Nipko
body: I have the same problem