So I've been installing and uninstalling windows 7 and windows 10 since it came out on my iMac for a long time! My iMac does not have a dvd drive because I took it out. I've been installing windows 7 and 10 from a bootable usb stick for years
All of a sudden I can no longer do it. I recently formatted my Mac because I wanted to go back to windows 7 since I was having issues with win10 turning off after an extended sleep period (I know my iMac was not compatible with windows 10 as per apple) anyways I been trying to re-install windows 7 for a while now and it just does not appear as a bootable hdd when you restart and hold option! It does appear with win 10 stick but then when I choose the EFI BOOT that pops up nothing happens or it freezes.
I've been doing a lot of reading and frankly, I am lost. I'm pretty sure it has something to do with a new firmware or bios update that is blocking whatever the hell!
My iMac has 3 hdd's installed and no dvd drive. I did buy a dvd drive and tried doing a dvd windows 7 install but that does not work either.
What gives and how do I fix it?