How to "initialize" an external USB hard disk?
I erased an external HD.
Now when I want to use it, it cannot be mounted, alert tells me it is not initialized.
How do I do that??
(In both Catalina and Ventura?
MacBook Pro
Question marked as
You'll use Disk Utility to initialize an external drive, aka erase, format and partition.
Erase and reformat a storage device in Disk Utility on Mac - Apple Support
FInd Disk Utility in Applications > Utilities folder.
For Catalina and newer macOS use, use the APFS format and GUID partition map.