Frist I updated mac os to Sierra
Then I tried to getting back to El Capitan unfortunately my reinstall macos dosen't work.
Now I stuck on page install macos Sierra public beta and also have process bar but nothing happened
Do you have another Mac?
Do you have a bootable backup or OSX install media?
If not then try:
- Try resetting the SMC and NVRAM/PRAM
Intel-based Macs: Resetting the System Management Controller (SMC)
https://support.apple.com/en-us/HT201295
About NVRAM and PRAM
https://support.apple.com/en-us/HT204063
- Boot to Recovery and repair the startup disk
OS X: About OS X Recovery - Apple Support
https://support.apple.com/en-us/HT201314
- If it is repairable reinstall the OSX>it you booted to Recovery partition that will install Sierra
How to reinstall OS X on your Mac - Apple Support
If you Mac has Internet Recovery
About OS X Recovery - Apple Support
Computers that can be upgraded to use OS X Internet Recovery - Apple Support
Try to force your Mac to boot into Internet Recovery by holding down Command+Option+R at startup.
If yoo can then format/erase the startup disk and install OSX. That will install the OSX version that cam with the mac.
My mac dosen't work after erased
