I've seen a lot of variants of this question, but well-nigh are pretty old, and don't quite match my utilize case.

How the heck practise you get ten.eight (Mountain Lion) running on the latest version of VirtualBox, east.chiliad., under x.9 (Mavericks)? I need it for testing.

asked Jun 3, 2022 at xvi:16

i

  • Are you looking to take 10.eight as a guest OS on the host ten.9 or the other way around?

    Jun three, 2022 at 16:51

one Answer 1

  1. First, you need to buy Mountain Lion (if yous oasis't bought it already). Go to Apple's web shop (not the App Store app), and search for "Mountain Panthera leo", and pay $20 for it.
  2. Look iii days. Fifty-fifty though they're just emailing you a PDF with a license code, information technology's done manually (and so I'thousand told), so it actually does accept 1-3 business days to go to you.
  3. In the App Store app, click "Redeem" (pinnacle right on the chief page), and paste in the code. Download the Mount Lion Installer. On Bone 10 x.9, yous'll become a warning that you tin can't downgrade, which is fine.
  4. Install VirtualBox four.3.12, or whatever the latest version is.
  5. Make a new VM image. You can use either "Mac OS Ten (64 flake)" or the 10.eight-specific one -- they both seem to work. Turn the video memory up to 128 MB -- at the default of 10 MB, information technology'll kick simply you won't be able to see anything. (I also suggest giving it more than than ii GB of RAM, and more than than i CPU.)
  6. To SATA port 1 (the offset gratuitous 1), attach "InstallESD.dmg" from inside the Mountain Lion Installer package (right-click in the finder to show the package contents, and elevate the .dmg to the file-picker dialog in VirtualBox). VirtualBox four supports DMG files natively, and InstallESD.dmg is bootable. Check "Live CD/DVD".
  7. Boot the image. When the first menu appears, open Disk Utility and "Erase" your virtual hard disk drive. Quit Deejay Utility.
  8. Install OS X on the virtual hd. (Notation: don't bother inbound your AppleID during the installation process -- it doesn't seem to accept it at that place. But in one case you're washed installing, y'all tin run the App Store app and enter your AppleID to download your purchased apps just fine.)
  9. Be sure to disassemble InstallESD.dmg before rebooting. (Just moving it lower than the hd in the boot order setting doesn't seem to do anything.)
  10. To increment the screen resolution to 1440x900, this answer was very helpful. (Setting <key>Graphics Mode</key> did not work for me.)

answered Jun iv, 2022 at nineteen:09

1

  • Doesn't seem to work for macOS ten.12 Sierra. I e'er go the error: no bootable medium found. The InstallESD.dmg is mounted as the CD/DVD bulldoze.

    Jan 25, 2022 at 10:51

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