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Released June 2012 / Core i7 processor with Turbo Boost / Up to 1 GB GDDR5 Video RAM

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Need to upgrade applications

hi @mayer! iʻm on a previously used/refurbished mbp 9,1, 16GB, 1TB SSD, so definitely third party additions. Iʻm currently running Sierra 10.12.6, but now i am falling off backward compatibility for various software that i need for work.

1) is upgrading to 10.13.6 likely to give me problems as the OP experienced,

2) likewise for 10.14 or 10.15,

in general, will i be ok on this machine upgrading to new OS? i see refurbished 9,1ʻs sold on the market with 10.14, but donʻt know if they have problems.

thanks so much!

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Your 2012 15" MacBook Pro should stay at Sierra (10.12.6) as being the best due to the differences between the older HFS+ and newer APFS file systems. The older HHFS+ runs better on SATA drives.

If you must, I would go to Mojave (10.14.6) ands no farther or High Sierra (APFS beta). Catalina won't run older 16/32bit apps and add-on's. You need 64-bit apps/add-ons so make sure you don't have any dependancies on the older 16/32bit. Catalina (10.15.x) is as high as you can go with this system.

But your biggest issue is the HD SATA cable! Your Hard Drive Cable Is A Ticking Time Bomb I strongly recommend replacing it and applying the tape as well. MacBook Pro 15" Unibody (Mid 2012) Hard Drive Cable & Remplacement du câble du disque dur/capteur IR du MacBook Pro 15" Unibody mi-2012

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MacBook Pro 15" Unibody (Mid 2012) Hard Drive Cable

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Kahana sera éternellement reconnaissant.
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