Is Mac OS Mojave compatible with mid 2011 imac

iMac (27-inch, Mid 2011)

Model Identifier: iMac12,2

Part Number: MC813xx/A, MC814xx/A

Newest compatible operating system: macOS High Sierra 10.13.6

Tech Specs: iMac (27-inch, Mid 2011)

iMac (21.5-inch, Mid 2011)

Model Identifier: iMac12,1

Part Number: MC309xx/A, MC812xx/A

Newest compatible operating system: macOS High Sierra 10.13.6

Tech Specs: iMac (21.5-inch, Mid 2011)

Hope it helps.

No. Mojave requires a 2012 iMac or later. You can install no later than macOS High Sierra.