Forum Discussion
Bluebellflora
6 years agoHero+
@sarahfelldown
Your only option to fix this is upgrade to a later version of Sierra, as I think you already know ☹️ You can still upgrade it even though you're booting from an external. After downloading High Sierra or later through the Mac App Store the installation window will open and the bootable Sierra drive will show next to the broken Macintosh HD (I had the same issue with my old iMac).
Your only option to fix this is upgrade to a later version of Sierra, as I think you already know ☹️ You can still upgrade it even though you're booting from an external. After downloading High Sierra or later through the Mac App Store the installation window will open and the bootable Sierra drive will show next to the broken Macintosh HD (I had the same issue with my old iMac).