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I have a late 2006 iMac with Intel Core2Duo, 64-bit (32 bit EFI) with some upgraded parts:

  • 2*2GB RAM (only 3 GB can be used)
  • 100GB SSD which has been running for 3 years now with trim-enabler

In the SnowLopard-Server instance which I had previously installed on it, I started to get visual errors, which got more and more over time. For example windows were blank, but the elements inside were still functional.

It seemed like a problem with the GPU to me, but I wanted to make sure and installed a MacOS Lion on it. During installation process, when loaded from the USB, there were no errors at all. But after installation and booting from the hard-drive, I got the errors again. I also tried to start a linux from a cd on that mac and there were no errors either.

This sounds like a problem with the SSD, doesn't it? Can I test this somehow before I buy a new SSD?

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    If you suspect a failure with the drive, get some drive diagnostics and test out. I like Disk Drill. The diags are free. – Allan Jun 15 '18 at 10:26
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    @Allan can I install it on a USB and run it from the boot-menu? or do I need to run a recovery OS from a flash-drive? – Phil Jun 15 '18 at 10:38
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    Since you already installed the OS on a USB, just run it from there. – Allan Jun 15 '18 at 10:40

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