Install deleted Keynote app in MAC
I am successful in reinstalling Keynote by following these steps,


Move Keynote app from Applications to Trash.
Empty trash.


its still shows UPDATE option, not GET option for Keynote in Appstore.

Power OFF and ON the MAC.
Appstore shows GET option for Keynote now.


It works fine even for Numbers, Pages. Please edit this post, if any feasible solution available.