Hi everyone. I could REALLY use some help.
I have a late-2011 15" MBP with a discrete GPU. It suffered the famous glitch in that model where the GPU failed and progressively I couldn't boot the machine. Eventually, it bricked (apparently permanently) in 2017 and I had to buy a new machine.
Recently I learned of a way to bypass the dGPU so the machine could boot and operate using the integrated Intel graphics (if interested, see http://dosdude1.com/gpudisable/). I managed to get the machine to boot for the first time in 4 years! But the battery is utterly shot, unsurprisingly.
Meanwhile, while I could get the machine to boot into High Sierra, it took forever to boot and then operated so slowly that it is pretty much unusable. Something is desperately wrong. Just moving the cursor across the screen, it stutters and jerks and lags. Opening Finder takes ~45 seconds. Obviously, the CPU is grinding through some kind of task repetitively (which is not apparent from Activity Monitor) or else is throttled by some 90%+. I've tried to run Sierra with the same result. I can't seem to download any earlier operating systems to try those, but this machine has a 2.4g i7 and shouldn't have a problem with either of Sierra or High Sierra.
Is the fact that the battery is dead a possible source of the problem? Or is there a possibility that, while it's bypassed, the dGPU is still operating super hot and the machine throttles for heat? (The fans aren't running, through). I tried to understand this page (https://apple.stackexchange.com/questions/267581/gpu-problem-boot-hangs-on-grey-screen/295805#295805) but it went over my head.
Please, can anyone help me here? It is very vexing. I can't understand what would be causing the machine to operate so slowly...
THANK YOU!
I have a late-2011 15" MBP with a discrete GPU. It suffered the famous glitch in that model where the GPU failed and progressively I couldn't boot the machine. Eventually, it bricked (apparently permanently) in 2017 and I had to buy a new machine.
Recently I learned of a way to bypass the dGPU so the machine could boot and operate using the integrated Intel graphics (if interested, see http://dosdude1.com/gpudisable/). I managed to get the machine to boot for the first time in 4 years! But the battery is utterly shot, unsurprisingly.
Meanwhile, while I could get the machine to boot into High Sierra, it took forever to boot and then operated so slowly that it is pretty much unusable. Something is desperately wrong. Just moving the cursor across the screen, it stutters and jerks and lags. Opening Finder takes ~45 seconds. Obviously, the CPU is grinding through some kind of task repetitively (which is not apparent from Activity Monitor) or else is throttled by some 90%+. I've tried to run Sierra with the same result. I can't seem to download any earlier operating systems to try those, but this machine has a 2.4g i7 and shouldn't have a problem with either of Sierra or High Sierra.
Is the fact that the battery is dead a possible source of the problem? Or is there a possibility that, while it's bypassed, the dGPU is still operating super hot and the machine throttles for heat? (The fans aren't running, through). I tried to understand this page (https://apple.stackexchange.com/questions/267581/gpu-problem-boot-hangs-on-grey-screen/295805#295805) but it went over my head.
Please, can anyone help me here? It is very vexing. I can't understand what would be causing the machine to operate so slowly...
THANK YOU!