2011 27-inch iMac Shutting Down Randomly – Seeking Advice
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iMac Shutting Down Randomly – Seeking Advice
crwdns2934249:0crwdne2934249:0:
Hello Everyone,
In mid-2011, I purchased a 27-inch iMac. Recently, I started using OpenCore Patch to install macOS Sequoia 15.0.1, which worked perfectly for a couple of days. After that, I updated to version 15.0.2 using OpenCore Patch again. During this time, I also installed and tested the Setapp application. Although I’m not sure if it’s related, a few hours after installing Setapp, my iMac began shutting down unexpectedly.
When the iMac shuts down, it attempts to restart, but the screen remains blank. To troubleshoot, I reverted to macOS High Sierra, but the issue persists: the iMac shuts down within 2–3 minutes of operation. After shutting down, I have to wait at least 20–25 minutes before it can power back on.
I carefully opened the iMac and checked all connections. The fans appear to be working correctly. Currently, I suspect the power supply might be the problem, as the system seems to require cooling time before restarting.
I would greatly appreciate any advice or suggestions to help me resolve this issue.
Thank you all in advance!
2011 27-inch iMac Shutting Down Randomly – Seeking Advice
crwdns2934249:0crwdne2934249:0:
Hello Everyone,
In mid-2011, I purchased a 27-inch iMac. Recently, I started using OpenCore Patch to install macOS Sequoia 15.0.1, which worked perfectly for a couple of days. After that, I updated to version 15.0.2 using OpenCore Patch again. During this time, I also installed and tested the Setapp application. Although I’m not sure if it’s related, a few hours after installing Setapp, my iMac began shutting down unexpectedly.
When the iMac shuts down, it attempts to restart, but the screen remains blank. To troubleshoot, I reverted to macOS High Sierra, but the issue persists: the iMac shuts down within 2–3 minutes of operation. After shutting down, I have to wait at least 20–25 minutes before it can power back on.
I carefully opened the iMac and checked all connections. The fans appear to be working correctly. Currently, I suspect the power supply might be the problem, as the system seems to require cooling time before restarting.
I would greatly appreciate any advice or suggestions to help me resolve this issue.
Thank you all in advance!