External Hard Drive Disappeared from Mac Finder
I have a 27-inch 2017 iMac, (Intel silicon), and permanently plugged into it, as my Time Machine backup disk, has been a 5TB LaCie Mobile Drive External Hard Drive with USB-C USB 3.0, which I bought direct from the Apple Store online.
It has been working fine, but this afternoon I woke up my iMac and there was a notification that was 'telling me off' for not ejecting a drive correctly. I had not ejected a drive, nor had I tried to.
But I now found that the Lacie external drive had effectively disappeared from my iMac, even though it is connected by USB-C and there is a steady white light on it.
I have tried unplugging it and plugging it back in; I have tried restarting my iMac. But the drive remains invisible on my iMac. When I open Time Machine settings the drive is listed as being my Time Machine drive, but it says that the next backup will be "After disk is connected", implying of course that it is not connected.
Because it doesn't appear in Finder or in Disk Utility I am struggling to work out how to get it back up and running again. Does anyone have any ideas, please?
iMac is running macOS 15.0.1
iMac 27″, macOS 15.0