iMac issues with installation OS and running
Hello dear community!
I am facing the weirdest issue with my friend's iMac 21 - 2010. He gave me his computer to install an SSD drive and ram memory. But after the installation, I am experiencing those problems that I've never had before in my entire computer fixing experience. I already spent a week trying to find a solution and still didn't find it. So, let me started.
I replaced an SSD as I usually did before. However, for some reason, when I started to install MacOS High Sierra, at the end of every installation, I start getting an error that system can not be installed on this computer. I've tried everything, even installing the Sierra. One time it went thru but then I decide to try again with High Sierra, and after that even Sierra decide not to install.
After that I decide to trick a computer and did an installation of MacOS High Sierra from another computer via the usb cord. The system did install. And I installed the SSD back to the iMac. It turned on and I did all the setup process for the account. But as soon as I connect a wifi, computer shuts down. When it turns on again, I decide to check an updates hoping that they will fix the problem. I got very wrong, because the update failed with a message that can not been installed. And after that system started to restart every single time when I logged in the account. The only way system was working was in safe boot mode but with turned off wifi. As soon as I turned it on, computer restarts again.
Please, please help! I already used all my knowledge and search the whole web but didn't find any solution!
Thank you in advance!
could it be some sort of safety switch triggered by lost my Mac?
由 Dan 完成的