I have been using my macbook pro since 2013. Around early 2017 I got a 275gb crucial ssd and installed it. It was working fine until about a month ago my macbook would no longer turn on. Took it to the repair store and they told me the motherboard had to be replaced. After replacing the motherboard my mac no longer uses my ssd to start up. After starting in internet recovery mode I looked at disc utility. My macbook recognizes my ssd, and it even passes verify/repair checks. However it will not let me mount it. After pulling up the command line and running:
diskutil list
I see:
/dev/disc0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_PARTITION_SCHEME *275.1 GB disc0
1: EFI 209.7 MB disc0s1
2: 7C3457EF-0000-11AA-AA11-00306543ECAC 274.9 GB disc0s2
as well as a few other discs that seem to be other local storages (all < 600KB)
I have tried running
mount /dev/disc0
and gotten
mount: /dev/disc0: unknown special file or file system.
when i run:
mount force /dev/disc0
i get:
mount: you must specify a filesystem type with -t.
So finally I try:
mount force -t /dev/disc0 and mount -t force /dev/disc0
and both return what seems to be a verbose/usage instruction message
Any ideas on what else i can do to get this disc to mount? It worked fine with the other motherboard! I'd like to avoid wiping it if i can but I am really not opposed to it as I backup most of my files to an external hard drive every now and then
Best Answer
Which part of the
mount: /dev/disc0: unknown special file or file system do you not understand.
7C3457EF-0000-11AA-AA11-00306543ECAC
is unknown disk format it should be Apple_APFS or Apple_HFSHope you have a back up and can reformat the disk.