[Nexus 10 Q&A, Help & Troubleshooting] brianiswu:
I was also able to flash the file with the correct bootloader version:

Flash Stock + Unroot...

------------------------------------------------------------------

erasing 'boot'...

OKAY [ 0.019s]

finished. total time: 0.020s

******** Did you mean to fastboot format this partition?

erasing 'cache'...

OKAY [ 0.019s]

finished. total time: 0.020s

erasing 'recovery'...

OKAY [ 0.020s]

finished. total time: 0.021s

******** Did you mean to fastboot format this partition?

erasing 'system'...

OKAY [ 0.019s]

finished. total time: 0.020s

******** Did you mean to fastboot format this partition?

erasing 'userdata'...

OKAY [ 0.020s]

finished. total time: 0.021s

sending 'bootloader' (1280 KB)...

OKAY [ 0.168s]

writing 'bootloader'...

OKAY [ 0.100s]

finished. total time: 0.270s

rebooting into bootloader...

OKAY [ 0.002s]

finished. total time: 0.002s

archive does not contain 'boot.sig'

archive does not contain 'recovery.sig'

archive does not contain 'system.sig'

archive does not contain 'vendor.img'

Creating filesystem with parameters:

Size: 29783752704

Block size: 4096

Blocks per group: 32768

Inodes per group: 8192

Inode size: 256

Journal blocks: 32768

Label:

Blocks: 7271424

Block groups: 222

Reserved block group size: 1024

Created filesystem with 11/1818624 inodes and 158176/7271424 blocks

Creating filesystem with parameters:

Size: 553648128

Block size: 4096

Blocks per group: 32768

Inodes per group: 6768

Inode size: 256

Journal blocks: 2112

Label:

Blocks: 135168

Block groups: 5

Reserved block group size: 39

Created filesystem with 11/33840 inodes and 4363/135168 blocks

--------------------------------------------

Bootloader Version...: MANTALJ12

Baseband Version.....: no modem

Serial Number........: R32CB03G6VJ

--------------------------------------------

checking product...

OKAY [ 0.014s]

checking version-bootloader...

OKAY [ 0.002s]

sending 'boot' (4608 KB)...

OKAY [ 0.585s]

writing 'boot'...

OKAY [ 0.019s]

sending 'recovery' (5108 KB)...

OKAY [ 0.647s]

writing 'recovery'...

OKAY [ 0.021s]

erasing 'system'...

OKAY [ 0.020s]

sending 'system' (522703 KB)...

OKAY [ 66.031s]

writing 'system'...

OKAY [ 4.249s]

erasing 'userdata'...

OKAY [ 0.020s]

sending 'userdata' (139141 KB)...

OKAY [ 17.548s]

writing 'userdata'...

OKAY [ 1.086s]

erasing 'cache'...

OKAY [ 0.019s]

sending 'cache' (10372 KB)...

OKAY [ 1.313s]

writing 'cache'...

OKAY [ 0.089s]

rebooting...

finished. total time: 91.692s

Booting up your freshly flashed stock device...

------------------------------------------------------------------

Wait for your device to finish booting up...

- It may appear to be boot looping; just wait...

- It could take 5-10 minutes; please be patient...

When its finally booted back up, please remember

to re-enable USB debugging if you plan on using

the toolkit to perform other operations.

NOTE: If this process was too quick and your device

is still in bootloader mode, then flashing stock may

have failed or been incomplete. Simply check the

log above: if you notice it skipped steps because it

didn't meet certain requirements, like the bootloader

or baseband version, then consider enabling 'Force Flash'

mode in the toolkits options menu and trying the

'Flash Stock + Unroot' processs again. Cheers.

Press any key to exit...

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but still stuck on the Google logo with the lock symbol.