Boot your laptop in Recovery Mode (cmd+R)
- Open the Terminal and find the
Apple_Boot Recovery HD
.
# diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *250.1 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 249.2 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
- Mount the drive.
# diskutil mount /dev/disk0s3
Volume Recovery HD on /dev/disk0s3 mounted
- Look for the new Volume and look for
BaseSystem.dmg
.
# ls /Volumes/Image\ Volume/com.apple.recovery.boot/BaseSystem.dmg
- Mount the DMG from the command line or Finder.
# hdiutil attach /Volumes/Image\ Volume/com.apple.recovery.boot/BaseSystem.dmg
- Insert your USB stick and open
Disk Utility
. - Format (
Erase
) your USB drive asMac OS Extended Journaled
. - Finally go to the
Restore
tab and drag the mounted volumeMac OSX Base System
into theSource
field and drag the USB volume into theDestination
. - After a couple of minutes your USB drive with name
Mac OS X Base System
should be ready! - To boot from the USB drive select it as the
StartUp Disk
or hold down option key on boot and select it from the choice of bootable devices.