The Apple Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
You can continue to find trusted guidance and support on the official Apple Support site.
We want to thank the community members who have contributed their time and expertise to help others with their Apple products.
The Apple Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
You can continue to find trusted guidance and support on the official Apple Support site.
We want to thank the community members who have contributed their time and expertise to help others with their Apple products.
My iMac keeps rebooting. Down load goes just past half way then reboots again.
iMac 27″, macOS 10.15
Try some of the following solutions for if your Mac that does not start up.
If your Mac doesn't start up all the way - Apple Support
If non of those get it going, call your local AASP and schedule a service visit.
Try some of the following solutions for if your Mac that does not start up.
If your Mac doesn't start up all the way - Apple Support
If non of those get it going, call your local AASP and schedule a service visit.
It is likely a hardware failure however by chance do you have any of the following third party apps installled?
iMac keeps rebooting
