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Model A1297 Unibody: Early 2009, Mid 2009, Mid 2010, Early 2011 & Late 2011

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Does my late 2011 17" A1927 have a 32 bit cpu?

My laptop has Catalina OS.

How is this possible?

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The CPU is either a i7-2760QM (2.4GHz) or a i7-2860QM (2.5GHz) both of which are Quad Core 64-bit Intel Mobile Core i7. Both also have a 64 bit EFI architecture

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no, it has 64-bit cpu i7-2760QM https://www.intel.com/content/www/us/en/...

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This is not correct! Review this listing to see what your given system has 17” MacBook Pro (A1297). This can be confusing as some in this series have a split CPU architecture. What it has internally and what it has externally are different review the Intel Core Duo 2 specs as far as the 2011/12 models (i5 & i7) they are 64Bit but the EFI firmware and the calls are 32Bit.

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@danj Thank you for your advice

I am 72 yo & a late newbie after 40+ years in construction & remodeling.

I have elected to use the late 2011 A1297 series due to my failing eyesight.

That is why I have 3 laptops to ensure I have backup protection rather than spending more $ that I don't have on the latest models.

I bought the 1 laptop for $300 that has the Catalina OS but I don't know how it got done.

I need help to upgrade the 2 laptops with the same specs, so I can go forward secure in the knowledge that I can deal with the many mundane tasks that takes up 80% of my life

Thank you for your help.

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@xmaslovechild - To be clear you have three of the same model (all are 2011 or 2012)? Is that correct?

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@danj Yes, that is correct

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@danj Are you as flummoxed as much as I am.

I thank you for what you have done up to this point.

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Dan crwdns2934231:0crwdne2934231:0
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