No one can access the Mac computer file system, or users see file system errors and corrupt files.The system directory or file system volume may have suffered damage from a virus attack.An internal Mac startup drive, SSD, memory card, or external hard drive will not mount.

There are several symptoms that a Mac user may be experiencing when hitting the “File System Check Exit Code Is 8” error: However, even the Mac can have a bad day and break down, and one of the most problematic Mac drive error messages seen at the Gillware Lab is the “File System Check Exit Code Is 8” error message.

Mac OS X (and all other mac editions) is built upon Unix, and a Mac computer is normally an incredibly reliable piece of hardware. The method I’m showing here requires some familiarity with the Terminal application, which can be found in /Applications/Utilities.The macOS personal computer is extremely popular with creative, professional, and home users. You can’t just use Disk Utility to reformat an APFS disk to HFS+ - once it has been converted to APFS, the only options that appear for erasing an APFS disk are to reformat in APFS. In this tech tip, I’ll show you how to revert back to HFS+. What if you accidentally format a drive in the APFS format and then realize you can’t use Time Machine or FileVault 2? I recently ran into this dilemma when I formatted an external drive in the APFS format and it was unusable by Time Machine. For example, APFS is incompatible with Apple’s Time Machine backup application and FileVault 2 (which is used to encrypt full drives), and cannot be used to format Fusion drives - those drives that use a combination of a solid-state drive and conventional hard disk drive. However, there are still some instances where HFS+ needs to be used. Check out this new article to see how to revert an APFS drive to HFS+ easily.Īpple’s new APFS (Apple File System) format is the default format for storage under macOS 10.14 Mojave, replacing the dependable and long-lived HFS+ format.

Changes to macOS and Disk Utility in macOS 10.15 Catalina now make this older method obsolete.

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