Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Level 1

35 points

High Sierra has bricked 2 HDDs, now what?

I was using a USB3 HDD to act as my local files space for my cloud backup. Upgrading to High Sierra went smoothly until the HDD stopped being recognised. This varied from the finder telling 'disk type not recognised, please initialise' to Disk Utility not seeing the drive at all (the drive clicks and whirs so gets power).

I though OK, let's cut my losses so bought the exact same drive (Seagate Expansion Portable Drive 1TB). Arrived loaded with the default software. Did what I always do i.e. erase with Disk Utility. Did that, at which point the disk unmounted and is as dead and invisible to Disk Utility as the first one. ***?

Any suggestions?

Thanks

MacBook Pro with Retina display, macOS High Sierra (10.13.1), i5 - 16/1024

Posted on Nov 17, 2017 4:26 AM

Best reply

Eau Rouge

Level 8

42,554 points

Posted on Nov 17, 2017 4:46 AM

High Sierras Disk Utility has one new 'feature', by default the sidebar in Disk Utility will only show Volumes and not Disks. To see the Disk click View in Disk Utilities menubar and then select Show All Devices, you should now see the Disk and the Volume(s) indented in the sidebar. To format the disk select the Disk not the Volume and select Erase and set the GUID Partition Map and Mac OS Extended (Journaled, same as you had done prior to High Sierra.