How Can I Tell If My RAM In My Mac® Computer Is Bad?
If you are having performance issues, software “hangs” or random crashes—we recommend you run a memory test. For the mac OS®, a popular tester is Rember®, which can be found here.
Set Rember to test All, and check the box next to Infinite number of loops, and let the test run for at least half an hour. Because Rember is running from your desktop, it's important that you shut down all applications before you run the test. If you have any programs open, the test will be a lot less accurate.
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