![]() ![]() ![]() ![]() Or *** Memory Test Failed *** Please check transcript for details. Or FAILURE: 0xbea1ce76 != 0xbea1ce7e at offset 0x06b3a4c8. Or FAILURE: possible bad address line at offset 0x06b3a4c8. If your RAM is bad, you will likely get a response really fast, and you will see something like: *** Address Test Failed *** One or more DIMM address lines are non-functional. Running comparison tests using 3671MB buffer.Īll tests passed! Execution time: 7068 seconds. NOTE: Memory request is too large, reducing to acceptable value.Īllocated memory: 7343MB (7700721344 bytes) at local address 0x00000000101000000Īttempting memory lock. Mac OS X 10.6.6 (10J567) running in single user mode Licensed under the GNU General Public License version 2 only To tell the Mac to boot into verbose 64-bit single user mode, go to Applications/Utilities/Terminal, and type:Ĭopyright (C) 2004-2008 Tony Scaminaci (Macintosh port) If you don’t feel comfortable following these instructions, take your Mac to a technician who not only feels comfortable fixing your computer, but is also competent to do so. Note: This article involves configuring your Mac in a way that could make it difficult for you to boot it normally if you don’t know what you’re doing. I wanted to document what I had done in a blog post so I could remember next time. Instead, I had to install memtest and boot the machine into single user mode in order to run memtest with the least amount of interference from running programs. On a PC, I would have booted a CD running memtest86, but none of my Internet research indicated that was possible for the Mac. At that point I had to learn how to best test RAM on a Mac. I had never seen this behavior from my Mac before, so figured the new RAM had something to do with it, but wanted to verify my assumption before blindly blaming Crucial for bad RAM. In December, I ordered 8 GB (2 4GB modules) of RAM from Crucial so I could max out the RAM in the machine, as I intend to keep it for a while.Įarly in January I started to see applications crash. ![]() My Macbook Pro came with 4GB of RAM in 2 2GB modules. ![]()
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