Help needed! My MacBook Pro is not happy (and not backed up- whoops!). It just sticks on the grey Apple screen when you start it up.. Tried all the online advice (ie. disk Utility repair, Safeboot, fsck), but not working. Next plan was to connect it to my Mac with Thunderbolt and try to back it up in Target disc mode, before reinstalling factory settings, but my mac is old and only has a FireWire connection. Is there someway of connecting thunderbolt to firewire? I've seen an adapter on amazon for £25. Will this work> is it worth the money, or am I unlikely to be able to back things up anyway?? Thanks for your advice!