On startup screen freezes on grey with centre circle with diagonal line. I have tried starting holding various keys as suggested on internet sites - control, option, P and R; C; etc. nothing seems to work. The computer has been quite hot lately. Prob a 2010/2011 model. The power transformer also getting quite hot. Perhaps time for replacement of the lot?
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I had this issue with my MBP and it was because the GPU was starting to fail. I would recommend trying to force the intel GPU to run on startup and see if you can get back into MacOS that way by following the steps here:https://forums.macrumors.com/threads/for...
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Sounds like your hard drive and/or HD cable is bad. Do you have a friend with a Mac that you can connect yours to? If you do see of you can run Disk Utility from your friends Mac to your attached system.
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Thank you Dan. Didn't have friend with apple so finally went to Apple itself. Hard drive ok (phew) but other problems suggested a new computer was in order. So that was the decision. Was able to transfer data myself via hard drive external reader.
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Thanks but finally had to get another computer. An expensive fix!
- de Jennifer Mansfield