Postagem original de: arbaman ,
Despite the fact that later machines are capable of running on later Os versions consider that Lion came out only in 2011, therefore until that date all machines would be able to start off your present hard drive with Lion installed. From there on, you would be able to further update your Os until the desired Os version. Since I'm not a musician I haven't any idea on how Garageband would update or behave or whether would make your Mac's old drive selfdestroy at sight. I hope somebody will be able to help with that, as that's beyond my knowledge.