where is option for Monterey download
Monterey upgrade does not work ??? where is the option to upgrade on my imac desktop
iMac 21.5″ 4K, macOS 10.15
It's your choice whether to stay with Macs or switch to Windows. If you decide to stay with Macs, you'll need a little more patience waiting for answers here on this user-to-user non-interactive help forum.
Whether your iMac is even capable of supporting Monterey depends on what specific model and year Mac you have. Are you talking about the "iMac 21.5″ 4K, macOS 10.15" mentioned below your post? What year is it? (You can check in "About This Mac" under the Apple menu.)
what have you tried so far? What issues did you encounter?