I have a macbook pro late 2011 running Yosemite, I am having a problem with my wireless keyboard not working so I can use an additional monitor. All of the letter keys work, but the other keys are not working. I have read some of the other old fixes, but none of them have helped. If someone could send me some help I would appreciate it very much.
MacBook
Pro, OS X Yosemite (10.10.5), Late 2011 model 2.4 GHz i7 8 GB 133