I found this message thread in my Junk Folder! 😡
My obsolete iMac (18,3) is currently running macOS 14.5 “Sonoma” via the awesome OpenCore Legacy Patcher tool 1.5.0 -> System Information: Model: iMac (27-inch, 2017) • CPU: Intel Core i5-7600K (4 Threads, 4 Cores) @ 3.80 GHz • Memory: 24.00 GB • Uptime: 12 days • Space: 2.00 TB • Graphics: Intel HD Graphics KBL, Radeon Pro 580 • Display: 5120 x 2880 • OS: macOS Sonoma (Version 14.5, Build 23F79)
I followed the directions from the OpenCore website and it was fairly easy to get it up and running. I purchased a 3-pk of Sandisk 32GB USB flash drives to build installers on and I always download a full OS installer when there is a new update before applying anything to the iMac. Plus, I use Time Machine and Carbon Copy Cloner faithfully to keep a pool of backups.
This iMac runs 24/7 and is quite happy with macOS 14.5… It is booted from an external Thunderbolt 3 OWC Envoy Express enclosure containing a 2TB Samsung 970 EVO Plus NVMe M.2 SSD. The iMac’s internal spinning drive, part of its 2TB “Fusion” drive had failed. I separated (un-Fusioned?) the spinning drive from the internal Apple SSD and use the internal 128GB SSD for a bootable backup macOS install as well as a bootable Windows 10 install when needed thanks to Apple’s Boot Camp tools.
I do not run video or photo editing apps very often, but everything I throw at it seems to work well. Among the apps that are always running are multiple browsers (But not Safari), IRC, Beeper, Discord, my custom Twitter/X client... The processor is currently at a cool 162°.. and ramps up once in a while to 200°.
Hopefully a nice M4 Mini or larger iMac will be offered and I will retire it, but for now it’s happy to meet my needs.
Mike