iMac inserting letters
I have an iMac that is inserting extra letters like this:
typing 1 or 6 inserts 16
typing q or y inserts qy
typing a or h inserts ah
typing z or nz inserts nz
The behavior is the same using either a Mac wireless keyboard or a Mac USB keyboard. It seems like a SW problem. Has anyone solved a similar problem?
iMac, macOS 10.12