How to install OS X without mouse

It took me quite a while to figure your question out but I did--and I also had the same question. The following steps should help anyone to navigate around when not using a key board.

1. Turn "VoiceOver" on by pressing: cmd + F5 (laptops might need to use "cmd + fn + F5"
2. Move around on a pane you are interacting with by using the following: Control-Option-Arrows (up/down/left/right)
   Example: control + option + "up arrow" -- You will move your selection to the next selection above...
3. To select a sub-category (e.g. in a grid or table) use: Control-Option-Shift-Down Arrow
4. To exit a sub-category use: Control-Option-Shift-Up Arrow

The best way is to play around with these commands. I, myself, am still figuring them out but there may be someone else looking for a response to your question as well. I hope my response helped.

Thanks. Extremely helpful. I have just spent about an hour trying every key combination I could think of and it was driving me nuts! Not to mention that since I do not have a wired mouse, it was beginning to look as though my Mac would be out of commission for a few days until I could buy one.

If you have access to a wired mouse, use it. You can connect the mouse directly to the iMac.

Thanks, very helpful.

The entire reason of this post was to answer how to install Mac OS withOUT a mouse. Stop filling google with pointless responses

You're Brilliant. It helped. Thanks a ton!!

Thanks, this was a very useful hint for me!