Disclaimer: There may be a better way to do this, but this is how I worked it out.
One of my recent frustrations with my MacBook is that I either have to leave my Wireless Mighty Mouse on all the time and just keep pumping batteries in there all the time or save my batteries and go through the Bluetooth connect process every time I open up the cover. Both are a bit of a hassle and somewhat annoying so I began hunting to figure out a reasonable alternate solution. From what I gather, there’s no real simple way to do it. But there’s a semi easy fix that has made my life easier.
For some reason in the Bluetooth Preferences pane, I can mark my mouse as a “favorite” but have yet to understand what that really means. That wasn’t the solution, as logical as it sounded to me. So I manhandled it my way. To do this on your Mac, you will need Quicksilver (a free application and one of my personal faves). Quicksilver sits right near the top of my “Essential Apps” list for sure.
What I did was take a little piece of AppleScript I found online and save it as an app out of Automator. Then I placed the app in my Applications folder and I can now kick it off through Quicksilver. In a couple keystrokes, I am connected to my mouse (or other device) and all is well with the world. If you would like to use the app for yourself, you can download it by clicking on the icon to the right. Give it a try and let me know what you think.