I have an exrernal drive connected by Thunderbolt and another connected by USB. Neither of these drive appear in the disk utility on my mac mini 2018. Should they? and if so, how do I make them appear
view
show all devices
I had the wrong settings in the Disc Utility. When I changed it to show all the drives appeared.
What file system are they external drives formatted as?
mac OS can only read certain file systems.
I have the same problem with my "Seagate Backup Plus 4TB External Hard Drive USB 3.0" under Catalina 10.15.1. The disk formatted for Time Machine does show up in system details, however can not be mounted or used. Disk Utility comes up with error message (com.apple.Diskmanagement.disenter eror 0.) My other identical 4TB drive, which is used to share files between my Windows and MAC system is recognised and I can read the files via FINDER, however I can not write new files to it.
I think CATALINA sucks !!!
What settings did you change???
My Seagate Backup Plus 3TB External Hard Drive USB 3.0 is no longer recognized since installing Catalina. Any suggestions?
External Drives not appearing in Disc Utility on mac min 2018
