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WasaMac_Mac

Level 1 (9 points)

iMac: Install OS on SSD and set as startup disk before removing HHD?

Thank you for the info. Should the SSD have the iMac's OS installed and set up as a startup disk before unmounting the failing HHD?

Posted on Sep 16, 2026 4:31 AM

1 reply

John Galt

Level 10 (162,806 points)

Sep 16, 2026 5:01 AM in response to WasaMac_Mac

Please post your followup questions here: Can a 2019 iMac with a dead internal drive run from an external SSD?

Originally posted at discussions.apple.com/thread/256358081