I have a MacBook Pro early 2011. End of last year it started to have the known issues with GPU. Using a tutorial from http://dosdude1.com/gpudisable/ to disable it and the same time I used a patcher from him to upgrade it to Majove although it was not compatible. Majove was running on it very nicely!
One day a few months later when I started my Mac it gave me the three beeps at startup and did not start up.
Than I bought a new set of RAM as I was told that the three beeps are because of that.
I thought that I will now "downgrade my Mac back to Yosemite as that worked safely on it and I have a bunch of expensive design programs that are running on Yosemite well.
Before that I took the hard drive out saved my data and erased it.
I put it back and run diagnostics to make sure that there is no hardware problem for sure. All went trough fine and no error messages.
I created a Yosemite Install Usb and wanted to install it and start the computer with that. Started up and after Apple Logo went on looping three beeps in between three seconds. I found out that it means that the operating system trying to boot into is incompatible with Mac hardware.
If I just start up normally than it goes grey and in the middle of the scree a folder with "?" for any other type of startup it goes trough the Apple logo than gray screen and nothing.
There is no way of getting any OS starting on it so far. I did not try other than macOS.
I had to get a new laptop to be able to work, but the old one would be a perfect one for the kids to play with.
Does anyone have a clue what could be the problem?
One day a few months later when I started my Mac it gave me the three beeps at startup and did not start up.
Than I bought a new set of RAM as I was told that the three beeps are because of that.
I thought that I will now "downgrade my Mac back to Yosemite as that worked safely on it and I have a bunch of expensive design programs that are running on Yosemite well.
Before that I took the hard drive out saved my data and erased it.
I put it back and run diagnostics to make sure that there is no hardware problem for sure. All went trough fine and no error messages.
I created a Yosemite Install Usb and wanted to install it and start the computer with that. Started up and after Apple Logo went on looping three beeps in between three seconds. I found out that it means that the operating system trying to boot into is incompatible with Mac hardware.
If I just start up normally than it goes grey and in the middle of the scree a folder with "?" for any other type of startup it goes trough the Apple logo than gray screen and nothing.
There is no way of getting any OS starting on it so far. I did not try other than macOS.
I had to get a new laptop to be able to work, but the old one would be a perfect one for the kids to play with.
Does anyone have a clue what could be the problem?