Updating the firmware works!
Ok, so here's officially how to fix this problem:
- Go to System Preferences (should be on the dock but if it's not, go; Finder > Macintosh HD [or whatever your Hard Drive is called] > Applications > System preferences)
- In the 'System' part of the window, go to 'Software Update' (the two blue arrows going around the .mac logo)
- Click 'Check Now'
- After it has checked, a list of downloadable updates will appear. Click 'Install'
- After the items have installed, the update will ask you to restart your Mac - do it
- After rebooting, a window should pop-up alerting you of an available Firmware Update you have downloaded. If not, click the magnifying glass at the top right of your screen (on your toolbar) type in 'Built-in Keyboard Firmware Update'
- (Your Mac must be connected to a power source for this step) Install the update - it should take under a minute
- Load up LimeWire
LimeWire should now run