I want to use my laptop keyboard and mouse as the input for both the Air and the iMac. I have tried apps that let me use the same input devices across different computers via wifi, but found them laggy.
Can I use ethernet to do this instead?
Or do I need to basically just use my iMac as a dumb monitor (with a thunderbolt cable I assume?). My iMac is really a great fast computer and didn't want to lose it and make the Air do all the heavy lifting if I can avoid it, I just prefer to have the second screen in front of me (ie laptop below and in front of iMac) and use the comfortable keyboard/trackpad setup of a laptop...