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piers35 Author

Level 1

4 points

apple 27 2011 os system

flashing? FOLDER on start up need to re install os system on my apple 27'' 2011 .....cant remember what operating system is running

ta piers

iMac 27″, OS X 10.10

Posted on Sep 14, 2021 7:09 AM

Top-ranking reply

Niel

Level 10

732,257 points

Posted on Sep 14, 2021 7:20 AM

Click here and follow the instructions. If the computer was running Mac OS X 10.6.8 or earlier and you reach the third set of steps, insert a Mac OS X install disk; in this case, it won't respond to the Command and R startup command.

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apple 27 2011 os system

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