I finally got my #iMac11,2 (mid-2010) up and running with a new metal compatible graphics card and it runs super smooth! Really glad with how it turned out!

Upgrading GPUs on these legacy iMacs is quiiiite the rabbit hole... So I detailed my process on github: https://github.com/Benedolt/legacy-macs-mods/blob/main/iMac11%2C2_GPU-upgrade.md