Want to highlight a helpful answer? Upvote!
Did someone help you, or did an answer or User Tip resolve your issue? Upvote by selecting the upvote arrow. Your feedback helps others! Learn more about when to upvote >
Did someone help you, or did an answer or User Tip resolve your issue? Upvote by selecting the upvote arrow. Your feedback helps others! Learn more about when to upvote >
A Mac which isn’t compatible with High Sierra isn’t compatible with Sierra either.
(158793)
In short the end of the line for a 2008 iMac is 10.11.x, your system does not have the hardware requirements to support a version of Mac OS beyond that.
How do I update to 10.12.6
