Are you trying to compile for the Mac or iOS?
Did you copy over the entire IDE directory to your iMac?
The" IDE/platform/apple/Source/Social Plugins" directory has the google stuff for iOS.
But, I cannot find it for the Mac (unless it is supposed to use the same ones). And it is the same setup as for v1088.
I haven't tried to compile the templates for v1089 in the Mac or iOS environments, yet.
EDIT: I just tried the iOS and Mac v1089 templates and both built and ran just fine.
Cheers,
Ancient Lady
AGK Community Tester and AppGameKit Master