A loosely connected or frayed USB cable is another possible reason the external drive is not recognized by your Mac. Follow the wizard to choose a volume size. But the "Scheme" popup menu does not appear in the panel. Why is my external hard drive not readable on Mac Your external hard drive is not readable on Mac because it is formatted in NTFS, HFS+, or another format not supported by macOS. Right-click on the external drives partition or unallocated space you want to format and choose New Simple Volume 4. If I select the secondary item in that list (Lexar), I can successfully do a format operation. Can’t copy, write, edit or delete files on Linux-formatted drives on your Mac It’s simply because macOS doesn’t support Linux drives at all, not even in the read-only mode. No matter what Scheme I choose, I get an error when trying to format the item higher in the hierarchy in the sidebar to the left (Lexar USB Flash…), as shown in the screen shot above. Mysterious error when formatting higher item The third one ( Apple Partition Map) is for booting old Macs (68K and PowerPC rather than Intel chips). Why is this offered as a scheme for "Mac OS Extended (Journaled)"? That really threw me, and prompted this Question. The second one ( Master Boot Record) is old, from the 80's DOS 2, for old PCs.
Booting is not an issue for my use of this flash drive. I know the first one ( GUID Partition Map) is for booting modern Macs. here are the primary functions of disk utility on mac: repair hard drives using disk utiltiy first aid.
disk utility on mac is a free built in tool that you can employ to finish all types of tasks.
When you consider price, ease of use, and portability, the Seagate Ultra Touch HDD is the most reliable hard drive you can carry around with you at all times. External Hard Drive Formatting Software For Mac When using Disk Utility 16.3 with macOS Sierra to format a "thumbdrive" USB 3 Lexar flash drive (64 gigs), when I choose a Format of ‘Mac OS Extended (Journaled)’, I get a list of three Scheme items: The best external hard drives for macOS Monterey are not only useful for storing data but are an excellent way to transport files from one location to another.