new issue
I can't update mac min 2012i thunderbolt firmware 1.2. can't output video. Couldn't fix it. Now Mac Mini keeps restarting😕😮😟😮ℹ. Thanks
Mac mini, OS X Mountain Lion (10.8.3), El Capitan
- Try resetting the SMC and NVRAM/PRAM
Intel-based Macs: Resetting the System Management Controller (SMC)
- Try starting in Safe Mode
OS X: What is Safe Boot, Safe Mode?
- Boot to Recovery and repair the startup disk
OS X: About OS X Recovery - Apple Support
- If it is repairable reinstall the OSX
How to reinstall OS X on your Mac - Apple Support
- If you do not have a backup use disk utility to restore the internal disk to an external disk so you can try to recover data.
Then format the startup disk and do a fresh install of OSX