My imac desktop will not respond to my wireless keyboard or mouse. I cannot go beyond the password input window so cannot access the computer to check bluetooth or anything what to do? I have tried attaching another keyboard and mouse no luck help?

Borrow a wired keyboard and mouse.

For regular alphabetic and numeric characters, almost any USB keyboard will suffice. If you do not need fine motor control, almost any USB mouse will do

If you cannot find a friend to loan you these, make an appointment at the Genius Bar, FREE, and borrow theirs. Comes with clever folks who know a lot about Macs to help you evaluate what the problem might be. Did I mention that it's FREE -- in warranty or out?

Has it been connected before??

It just happened my trackpad and keyboard wouldn't sync,

I turned my mac off for five seconds then turned it on an happydays

It was back