Comments on: How to Test RAM Under Mac OS X http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/ Technology and Mac geekery. One part exuberance, two parts obsession. Sat, 06 Nov 2010 02:41:26 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Testing your memory using memtest « iLeo's Blog http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/comment-page-1/#comment-151128 Testing your memory using memtest « iLeo's Blog Wed, 04 Aug 2010 09:02:53 +0000 http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/#comment-151128 [...] but the official download website asks to pay a small amount for downloading it. However, there are alternative download sites and even alternative frontends to the memtest command line tool. August 4th, 2010 | Category: [...] [...] but the official download website asks to pay a small amount for downloading it. However, there are alternative download sites and even alternative frontends to the memtest command line tool. August 4th, 2010 | Category: [...]

]]> By: G$M http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/comment-page-1/#comment-151124 G$M Mon, 02 Aug 2010 15:27:53 +0000 http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/#comment-151124 Ben replied saying... " Bew & Matt: Most likely, the issue is that the MacBook has integrated video that needs to allocate 256MB of RAM for the display buffer. That area (and any other area of memory that’s allocated, like where the kernel and the memtest program itself are loaded) can’t be tested. But if your machine isn’t panicking and doesn’t have any display glitches, its probable that that allocated memory is OK. " I have a question about this- My system does freeze up occasionaly - and I ran Memtest 1 and saw an error but I had forgoten to plug my laptop in so it died before the test completed. but when I run it again I don't get an error. so is it possible that the postion of memory that is allocated to the display buffer or whatever else varies? is there a way to actually check it all? thanks, -G Ben replied saying…
”
Bew & Matt: Most likely, the issue is that the MacBook has integrated video that needs to allocate 256MB of RAM for the display buffer. That area (and any other area of memory that’s allocated, like where the kernel and the memtest program itself are loaded) can’t be tested. But if your machine isn’t panicking and doesn’t have any display glitches, its probable that that allocated memory is OK.
”
I have a question about this-
My system does freeze up occasionaly – and I ran Memtest 1 and saw an error but I had forgoten to plug my laptop in so it died before the test completed.
but when I run it again I don’t get an error.
so is it possible that the postion of memory that is allocated to the display buffer or whatever else varies?
is there a way to actually check it all?
thanks,
-G

]]> By: kernel panic error Please Help! - Mac-Forums.com http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/comment-page-1/#comment-149648 kernel panic error Please Help! - Mac-Forums.com Mon, 08 Feb 2010 02:23:31 +0000 http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/#comment-149648 [...] is overclocking or is subject to a power surge. Take a look here for some memory test options: How to Test RAM Under Mac OS X | Command-Tab __________________ Community [...] [...] is overclocking or is subject to a power surge. Take a look here for some memory test options: How to Test RAM Under Mac OS X | Command-Tab __________________ Community [...]

]]> By: How to Test RAM Under Mac OS X « Chicago Mac/PC Support http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/comment-page-1/#comment-147702 How to Test RAM Under Mac OS X « Chicago Mac/PC Support Tue, 05 Jan 2010 23:42:41 +0000 http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/#comment-147702 [...] to Test RAM Under Mac OS X This is an informational post that lists some programs and command lines utilities to test RAM. You should suspect this if you are having problems after a clean [...] [...] to Test RAM Under Mac OS X This is an informational post that lists some programs and command lines utilities to test RAM. You should suspect this if you are having problems after a clean [...]

]]> By: Is your RAM ok? « Mac World Freshman http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/comment-page-1/#comment-147450 Is your RAM ok? « Mac World Freshman Sun, 01 Nov 2009 01:28:57 +0000 http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/#comment-147450 [...] requires a lot of more technical knowledge but Collin Allen of command-tab offers an easy installation package which makes running the test hassle [...] [...] requires a lot of more technical knowledge but Collin Allen of command-tab offers an easy installation package which makes running the test hassle [...]

]]> By: jp http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/comment-page-1/#comment-147360 jp Fri, 02 Oct 2009 23:29:36 +0000 http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/#comment-147360 thank you !!! this app is extremely usefull thank you !!! this app is extremely usefull

]]> By: Conor http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/comment-page-1/#comment-147249 Conor Thu, 03 Sep 2009 16:08:30 +0000 http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/#comment-147249 Hi, after running memtest all 2 I get the following error: Bit Flip : testing 168 of 256 FAILURE! Data mismatch at local BUFA address 0x0196713c, BUFB address 0x238fedbc BUFA Data: 0xffefffff, BUFB Data: 0xffedffff Everything else passed except that. Do you know what could be causing that? Hi,

after running memtest all 2 I get the following error:

Bit Flip : testing 168 of 256

FAILURE! Data mismatch at local BUFA address 0x0196713c, BUFB address 0x238fedbc
BUFA Data: 0xffefffff, BUFB Data: 0xffedffff

Everything else passed except that. Do you know what could be causing that?

]]> By: Conor http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/comment-page-1/#comment-147248 Conor Thu, 03 Sep 2009 15:39:32 +0000 http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/#comment-147248 Thanks for the package. I am running memtest on my mac right now because I think that there might be some faulty hardware, I bought it second hand. I just hope it's not the graphics card or the logic board! :L Thanks for the package. I am running memtest on my mac right now because I think that there might be some faulty hardware, I bought it second hand. I just hope it’s not the graphics card or the logic board! :L

]]> By: David http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/comment-page-1/#comment-147013 David Mon, 03 Aug 2009 15:03:22 +0000 http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/#comment-147013 When I look at /usr/bin in Finder, I can see memtest, but when I boot into Single-User mode, most of the files that were in /usr/bin are not visible, including memtest. I tried ls -a, and I still don't see anything. Why would all these files not be available? When I look at /usr/bin in Finder, I can see memtest, but when I boot into Single-User mode, most of the files that were in /usr/bin are not visible, including memtest. I tried ls -a, and I still don’t see anything. Why would all these files not be available?

]]> By: Jerk http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/comment-page-1/#comment-146918 Jerk Sun, 19 Jul 2009 05:09:02 +0000 http://www.command-tab.com/2008/01/11/how-to-test-ram-under-mac-os-x/#comment-146918 Since I'm a big jerk, I have posted a copy of this GPL software at my web site after I paid for it. Sourceforge would host it for free. Hope it was worth the buck fifty, Scamaroni. Since I’m a big jerk, I have posted a copy of this GPL software at my web site after I paid for it. Sourceforge would host it for free. Hope it was worth the buck fifty, Scamaroni.

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