Install macOS no usb dvd boot

Discussion in 'macOS' started by colinzim, Jun 23, 2017.

  1. colinzim

    colinzim MDL Senior Member

    May 14, 2007
    438
    90
    10
    If you want to re-install macOS on a running older Mac or have no usb or dvd boot option:

    Shrink boot drive by size of the macOS Install DMG. 5 or 6 gb

    Create new partition with new free space

    Restore macOS install DMG to new partition space.

    Go to preferences > startup and select your "macOS install" as startup.

    Reboot.

    Install macOS to bootable partition.

    Works on new macs, older macs and even Windozzz :)

    Tested on my mac mini G4 which has no usb boot option and Leopard over 4.7 gb dvd.
     
  2. jesuis999

    jesuis999 MDL Novice

    Jul 28, 2017
    2
    0
    0
    Hi, thanks for sharing.
    I have an old MacBook Pro (Aluminum) OS El capitan. An tried for fun to put windows on it didn't like it.
    So i tried put back a genuine DVD to restore it but get stuck, cannot turn o n the MAC anymore, i hear only the sound of the processor that's it and even the DVD doesn't get out. Any idea to resolve that issue?
     
  3. colinzim

    colinzim MDL Senior Member

    May 14, 2007
    438
    90
    10
    duplicate