Are there external drives compatible with the old iMac OS 10.10.5 (Yosemite)?
My iMac stopped booting. Disk utility can’t repair the disk and it says back up as many of your files as possible, format the disk, and restore your back-up files. So I bought a Seagate Backup plus Slim but I realized it’s compatible with Mac OS 10.11 or higher.
iMac 21.5″, OS X 10.10