- Feb 19, 2017
- RX 580
No access to clover menu also ...
Did you try removing battery cable and AC power? If you feel comfortable opening up the MacBook (model dependent and warranty considerations) if it's an older model like mine it's easy. I've frozen my MacBook a few times and do this to recover. I run everything from Mavericks to High Sierra on mine.
If you can get it apart and do that, also remove the ram and reset by hitting power button with no battery or AC connected.
Unfortunately i trashed my mac mini also...Installed a new ssd after i cloned it in an usb dock with carbon cloner .After that i got a question mark instead of booting into macos..I had at hand a usb drive made for my hackintosh so i just booted into the setup just to see if the drive was recognized in disk utility ...After this i just rebooted...and that was it..mac mini bricked...black screen and the chimes running continuously. Took it apart, took every part from the motherboard including the battery...nothing worked. I took it to a shop but they said it`s the motherboard. I just ordered now from ebay a new bios efi chip. Hope it will work. I will get back to you guys when i have an update. But cannot believe that mac`s are so f*** dumb and the bios gets corrupted just by booting an usb..and without the possibility of rewriting or something like that.