i m using macbook pro
osx crashed
i m stuck in disk utility 320gb hd ( 1 partition name Mac osx install esd ) wich is below hitachi) showing capacity 319.21, available ,used 4.43 gb
if i m erasing 320 hd it showing me disk erase failed with error : couldn't unmount disk
there is 1 more option called disk1 ( total capacity 1.26 gb )
below it mac os x base system ( capacity 1.26 gb , available 110.9 mb , used 1.15 gb )
how should i install osx lion via usb.?
kindly help me