Help with Upgrading macOS on iMac 1312 (32GB RAM, i7 3.2GHz, Nvidia Quadro K2100M)

Hey everyone,

I'm currently running an iMac 1312 (mid-2011) with 32GB of RAM and an i7 3.2GHz processor, along with an upgraded Nvidia Quadro K2100M graphics card. The system is currently on macOS High Sierra, and I'm using OpenCore Legacy Patcher for compatibility.

I'm looking to upgrade to a newer version of macOS, but I want to make sure I do this safely and avoid any major issues. Can anyone recommend which macOS version would be the safest and most stable to upgrade to?

Specifically, I’d like to know:

• What macOS version should I aim for without compromising system stability?
• Are there any major pitfalls or issues I should be aware of, such as compatibility problems with my hardware or software?
• Will features like the screen dimming still work after the upgrade? (This is one of my concerns.)
• Anything else I should watch out for when upgrading using OpenCore Legacy Patcher?

Any help or advice would be greatly appreciated. Thanks in advance