macOS partition startup Volume type FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF
The proper GUID of APFS partitions is 7C3457EF-0000-11AA-AA11-00306543ECAC.

The default pMBR was replaced with an old-style MBR, probably by the Linux installation!

Your boot system (in Internet Recovery Mode) seems pretty old. Any disk or partition verification executed with diskutil may yield some bogus result. In no case try to repair anything with diskutil!



To get your APFS partition back remove partition disk0s2 and restore it with the proper type:


Open in the menubar > Utilities > Terminal
get some details:

diskutil list #below I assume the disk identifier of the internal disk is disk0
gpt -r show disk0

Unmount disk0:

diskutil umountDisk disk0

remove and restore the 2nd partition:

gpt remove -i 2 disk0
diskutil umountDisk disk0
gpt add -i 2 -b 409640 -s 372637568 -t 7C3457EF-0000-11AA-AA11-00306543ECAC disk0

verify disk and partition:

diskutil list
diskutil verifyDisk disk0       
diskutil verifyVolume disk0s2





Your Mac should be able to boot despite the MBR.

If you want (or have) to restore the pMBR because the MBR is stubborn/blocks the modification of the partition table do the following:


get all disk details:

diskutil list #below I assume the disk identifier of the internal disk is disk0
gpt -r show disk0

replace the GUID partition table:

diskutil umountDisk disk0
gpt destroy disk0
gpt create -f disk0

re-add all previous partitions visible in the last gpt -r show disk0 output:

gpt add -i 1 -b 40 -s 409600 -t C12A7328-F81F-11D2-BA4B-00A0C93EC93B disk0
gpt add -i 2 -b 409640 -s 372637568 -t 7C3457EF-0000-11AA-AA11-00306543ECAC disk0
gpt add -i 3 -b 373047208 -s 262144 -t 426F6F74-0000-11AA-AA11-00306543ECAC disk0
gpt add -i 4 ...
gpt add -i 5 ...


If you get a resource busy error after one of the steps, just unmount disk0 again with

diskutil umountDisk /dev/disk0

Finally verify disk and partitions:

diskutil list
diskutil verifyDisk disk0       
diskutil verifyVolume disk0s1
diskutil verifyVolume disk0s2
diskutil verifyVolume disk0s3
#disk0s4 &amp; disk0s5 can't be verified with the default macOS tools because the latter is a Linux swap and the former a Linux partition, probably with ext4


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