What OS is compatible with iMac 21.5 inch, 2017 ?
My software update window cannot find ANY updates, and an update is required by some applications.
I am currently using OS Catalina 10.15.7
iMac 21.5″, macOS 10.15
Question marked as
See the following from Identify your iMac model - Apple Support
iMac (Retina 4K, 21.5-inch, 2017)
Model Identifier: iMac18,2
Part Numbers: MNDY2xx/A, MNE02xx/A
Newest compatible operating system: macOS Ventura
To upgrade to Ventura, see: How to download and install macOS - Apple Support