Installatie problemen met OS X 10.7 van CD

November 2014 aangepast in OS X 10.9 of eerder
op apple macbook 4,1met intelcore 2 duo en OS 10.6.8 wil ik OS 10.7 installeren. Heb dmg file op CD. Geeft bij installatie error: failed to create boot file dir at /Volumes/Mac OS X Lion/.IABootFiles: Error Domain=NSCocoaErrorDomain Code=643 UserInfo=0x100114b90 "You can't save the file ".IAbootfiles"because the volume "Mac Os X Lion" is read only." Underllying Error=(Error Domain=NSPOSIXErrorDomain Code=30 "the operation couldn't be completed. Read-only file system")
Oplossing???

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