macOS partition not mounted (FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF)

After upgrading to High Sierra, my Macintosh_HD partition got corrupted. Only Windows was working so I got into terminal from internet recovery. And corrected the FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF partition type. (I used instructions from other similar posts) Here are the details after I corrected disk0s2 partition type, which was FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF. And that picture is from diskutil list … Read more

MacBook Air High Sierra disk image not recognised couldn’t open

I created a disk image from a folder using disk utility and now when I double click it to open it i get an error message saying image couldn’t be opened. Image not recognised. What can I do? Answer AttributionSource : Link , Question Author : Joey Martin , Answer Author : Community

How can I *unlock* a CoreStorage volume that is not recognized?

I have a 4TB Seagate Expansion Portable Drive with <1 TB data. It’s HFS+, GUID Partition, encrypted with File Vault. It was unplugged without disconnecting, and now the disk image does not mount. It appears in disk utility as so: Running First Aid, we receive the following message: We reboot in recovery mode, and run … Read more

Finder refuse to open shared files with Microsoft Office

We have a nfs share server mounted trough automount on which we store multiple *.xls files. Since a few days, two MacBooks refuse to open those files with the following error message: “file.xls” is damaged and can’t be opened. You should eject the disk. “file.xls” is on the network volume “name_of_volume”. Microsoft Excel opened this … Read more