Hello, I have a Late 2009 Macbook 2.4 6gb RAM 750 gb HD with 10.8.5 installed. It runs smoothly. However I want garageband it doesn't download unless I have 10.9 installed. I don't have a backup Hd and I am scared to update because previously my HDD was broken after mountain lion update. I had to painfully wipe the drive and clean install the OS. I lost my work data and other stuff. Now I can't afford an external drive because they are really expensive in my country (because of the exchange rates being so high). Should I update to Mavericks without backup. Or is there a way to back up the drive without an external drive?. Is there anybody with late 2009 alu macbook running mavericks? Can you give some feedback? Thanks in advance.