Since el capitan was released I have multiple problems with my mac (3 installations).
1 I shutdown my mac and when i restart a hear the song and after logo appear he start again and stay in a loop process restart and restart....
2- when i close the cover, he should stop working, but does not, get work trying burn off battery
Hey there biza_tazon,
Welcome to Apple Support Communities.
If I understand correctly, you've installed OS X El Capitan on your Mac several times and continue to run into intermittent issues turning the device on and putting it to sleep.
This article provides a lot of great information and troubleshooting tips that should help you resolve the issue turning your Mac on:
If your Mac won't turn on - Apple Support
The article below provides similar tips that will resolve issues putting devices to sleep.
If your Mac doesn't sleep or wake when expected - Apple Support
Cheers.
El Capitan problem
