I tried to revert back to OS X, but I can't boot into recovery, or USB. It shows the prohibited symbol (a circle with a line through).
I thought it was a good idea to install Windows on a Mac, but it turns out it's a terrible idea (driver issues, slow downs, overheating).
What should I do?
I think my hard drive partitions are messed up.
I used this guide to install windows 7
http://derekhat.com/install-vista-on-a-macbook-without-bootcamp/
Best Answer
Reinstall macOS (OS X)
Mac OS Extended (Journaled)
for the format.Start up from macOS (OS X) Recovery over the Internet
Reset your computer’s NVRAM or PRAM
Appendix
How to reset NVRAM on your Mac
How to reinstall macOS
About macOS Recovery