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Apple Computing Products:
macOS - Operating System
MacBook Pro upgraden to OS X Maverick
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<blockquote data-quote="bobtomay" data-source="post: 1579581" data-attributes="member: 24160"><p>Mountain Lion and above require a 64 bit EFI architecture.</p><p></p><p>Your MacBook Pro is a late '06 model - I have one also - the EFI is 32 bit in them.</p><p></p><p>And, I can tell you, no way you want to put Mountain Lion or Mavericks on a machine with less than 4GB RAM. Max usable in that '06 model is 3 GB. You can put 4 GB in it to maintain dual channel mode, but it can only use 3 GB.</p></blockquote><p></p>
[QUOTE="bobtomay, post: 1579581, member: 24160"] Mountain Lion and above require a 64 bit EFI architecture. Your MacBook Pro is a late '06 model - I have one also - the EFI is 32 bit in them. And, I can tell you, no way you want to put Mountain Lion or Mavericks on a machine with less than 4GB RAM. Max usable in that '06 model is 3 GB. You can put 4 GB in it to maintain dual channel mode, but it can only use 3 GB. [/QUOTE]
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Apple Computing Products:
macOS - Operating System
MacBook Pro upgraden to OS X Maverick
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