![I can't upgrade my MacBook Pro mid 2012 from Mountain Lion to any newer macOS, High Sierra or Mojave. After installation is complete via usb and on the first boot it goes I can't upgrade my MacBook Pro mid 2012 from Mountain Lion to any newer macOS, High Sierra or Mojave. After installation is complete via usb and on the first boot it goes](https://i.redd.it/pt5wj227j3r21.jpg)
I can't upgrade my MacBook Pro mid 2012 from Mountain Lion to any newer macOS, High Sierra or Mojave. After installation is complete via usb and on the first boot it goes
MacBook Pro 15" Unibody Mid 2012 Disable 2nd GPU to prevent white screen or green stripes during boot process. - iFixit Repair Guide
![MacBook Pro 2012 moving really slow on Boot up from Catalina bootable usb after SSD and RAM upgrade. It took all night to install the OS and now has been moving extremely MacBook Pro 2012 moving really slow on Boot up from Catalina bootable usb after SSD and RAM upgrade. It took all night to install the OS and now has been moving extremely](https://i.redd.it/ztjg6i27jzw41.jpg)