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Apple Computing Products:
macOS - Notebook Hardware
Memory Upgrade: One slot not reading
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<blockquote data-quote="pigoo3" data-source="post: 1512212" data-attributes="member: 56379"><p>I'm assuming that it's at least a Late 2008 MBP...since the OP says it's a Unibody (definitely easy to identify).<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> </p><p></p><p>But...depending on how accurate the OP's identification is...if it's actually a later model MBP (say 2009)...then it would more easily support 8 gig of ram (no ROM upgrading issues). </p><p></p><p>If this was the case (newer than Late 2008)...then the issue could be a bad ram slot (which I don't think that it is...since the old ram works in both slots)...thus leaving the issue to be a bad stick of ram (if testing in both ram slots with the new ram doesn't fix things).</p><p></p><p>But...assuming the OP is correct & the MBP is a Late 2008 model...then it's probably the ROM/firmware update possibility.</p><p></p><p>- Nick</p></blockquote><p></p>
[QUOTE="pigoo3, post: 1512212, member: 56379"] I'm assuming that it's at least a Late 2008 MBP...since the OP says it's a Unibody (definitely easy to identify).:) But...depending on how accurate the OP's identification is...if it's actually a later model MBP (say 2009)...then it would more easily support 8 gig of ram (no ROM upgrading issues). If this was the case (newer than Late 2008)...then the issue could be a bad ram slot (which I don't think that it is...since the old ram works in both slots)...thus leaving the issue to be a bad stick of ram (if testing in both ram slots with the new ram doesn't fix things). But...assuming the OP is correct & the MBP is a Late 2008 model...then it's probably the ROM/firmware update possibility. - Nick [/QUOTE]
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Apple Computing Products:
macOS - Notebook Hardware
Memory Upgrade: One slot not reading
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