My Macbook Pro 15 early 2013 went blank upon login after 6 years. after 2 weeks of research and try-and-error, this seems to be (at least for me) easiest viable solution (well, fix, because the Nvidea GPU is still broken)
1. Enter recovery mode after booting with cmd-R
2. enter Terminal
enter the following 4 commands:
$ csrutil disable
$ nvram boot-args=”nv_disable=1”
$ csrutil enable
$ reboot
3. that's it.
=> drawbacks:
1. brightness control f1-f2 doesn't work
2. screen stays on when macbook gets closed, but continues to work when opened
3. sleep mode doesn't work, when entered, requires hard-reset by long-press power button
in more detail:
my macbook (15 retina, early 2013) has an encrypted SDD (so I can't start in safe mode or single-user mode) and it went black right after I logged in, so no chance of installing the gfxcardstatus app everyone is raving about to solve this. But this works, and takes only 5 minutes. tried several re-starts, still works.
Same problem with my bootcamp windows 10 partition, screen went blank even before login and couldn't enter safe mode, so had to re-install from USB stick, and de-activate Nvida in the device manager and re-built system from there manually, as soon as I would install the correct Nvidea driver, screen would go blank again. (enter safe mode, de-activate Nvidea, rinse, repeat...)
1. Enter recovery mode after booting with cmd-R
2. enter Terminal
enter the following 4 commands:
$ csrutil disable
$ nvram boot-args=”nv_disable=1”
$ csrutil enable
$ reboot
3. that's it.
=> drawbacks:
1. brightness control f1-f2 doesn't work
2. screen stays on when macbook gets closed, but continues to work when opened
3. sleep mode doesn't work, when entered, requires hard-reset by long-press power button
in more detail:
my macbook (15 retina, early 2013) has an encrypted SDD (so I can't start in safe mode or single-user mode) and it went black right after I logged in, so no chance of installing the gfxcardstatus app everyone is raving about to solve this. But this works, and takes only 5 minutes. tried several re-starts, still works.
Same problem with my bootcamp windows 10 partition, screen went blank even before login and couldn't enter safe mode, so had to re-install from USB stick, and de-activate Nvida in the device manager and re-built system from there manually, as soon as I would install the correct Nvidea driver, screen would go blank again. (enter safe mode, de-activate Nvidea, rinse, repeat...)
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