Fix up old iMacs for resale with OCLP or just send them out with the latest macOS they can run?

Hey everyone -

At the moment I have three iMacs:

1. Retina 5K, 27-inch, Late 2015

  • 3.2 GHz Quad-Core Intel Core i5
  • 8 GB RAM, AMD Radeon R9 M390 (2 GB)
  • 1 TB HDD (not SSD)
  • macOS Monterey 12.7.6

This one has the best display (Retina 5K) and is the newest of the bunch, but it has a standard hard drive instead of an SSD.

2. 27-inch, Late 2013

  • 3.2 GHz Quad-Core Intel Core i5
  • 32 GB RAM, NVIDIA GeForce GT 755M (1 GB)
  • 2 TB SSD (Samsung 860 EVO)
  • macOS Catalina 10.15.7

This one has the most memory and storage, with a large SSD, making it faster overall.

3. 21.5-inch, Late 2012

  • 8 GB RAM, NVIDIA GeForce GT 640M (512 MB)
  • 240 GB SSD (PNY CS900)
  • macOS Catalina 10.15.7

I'm in the IT business, a one man shop and I support various individuals and small businesses. At the moment I've got these three systems (and a handful of Mac laptops of various ages and conditions).

I'm trying to decide what to do with these iMacs. I just got done doing clean installs from Internet Recovery on all three. I had offered them to my niece and nephew but neither are super tech savvy and wouldn't be motivated enough to update them.

I could donate to someone else or sell as is without any updates, in the hopes that they'd find them usable and be able to do the OCLP installs and maintain them.

But I'm also considering updating them myself and then selling them. I'm very Mac savvy, been using Macs for decades and supporting them, built Hackintoshes before, etc. I think it might be fun to get good at this. I had tried OCLP a couple of years ago but didn't stick with it. I'm wondering if it's more mature now and easier to maintain.

So two things I want to figure out:

  1. Will one of these machines running a current macOS bring enough of a premium to make the effort worthwhile? My instincts say no. But, I want to see the machines have their best chance at their next life and feel compelled to upgrade them.

  2. Can I send them out the door with some instructions on how to handle updates / upgrades and maybe a bootable USB installer for emergencies? I don't want to provide lifetime free support for these machines.

submitted by /u/timeshifter747
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