It seems the Multi-Touch trackpad on my Mid-2009 15" Unibody MBP has gone bad, how difficult to fix? The pointer moves, but has no click. Therefore, I must use an external mouse (Bluetooth or USB) —— so my MacBook Pro Laptop is now a desktop, for all practical purposes. How easy is it to fix this problem? I have replaced the battery and the hard drive a year ago, with no problems. Is the trackpad easy to replace? MacBook Pro "Core 2 Duo" 2.53 15" with 2.53 GHz Core 2 Duo .. Mid-2009 15" ID MacBookPro5,4.