create a bootable mac usb with vertual bax

The script does need administrator access for the 10.13.x to 10.15.x installer.

You don't need to be using 'sudo' or being logged in as administrator

The script does not need administrator access for the 10.7.x to 10.12.x installers.

The script will leave you with an ISO image named '10.#(.#).iso', where # is.

And if you don't have 15 GB available, the script is the least of your problems. Most of the time less, but let's be conservative.

You'll need 15 GB of free space for that.

The script is not portable, as it uses some OSX only options.

If you encounter an error, re-run the script with the extra verbose option ' -v 3', copy the whole Terminal output and post it here with as many details as possible (besides the output that is).

If you have any suggestions, feel free (if not obliged) to share your thoughts.

This is my first attempt at bash scripting, so please go easy on me.

' InstallerApp2ISO.sh' creates an ISO file from the various OSX installer applications that Apple distributes (freely) to existing OSX users:

The script now works on all OSX installers, from 10.7.x up to 10.15.x. The problem is that this is not ideal for users of VirtualBox who wanted to install a clean VM from scratch, or (until VirtualBox 5.1) could not boot their VM from a bootable USB.

With OSX 10.9 (Mavericks) Apple started distributing the OSX installer as a standalone application, with instructions on how to create bootable USB sticks if needed. If you have any idea on how to make this work, I'd appreciate a comment. There is a bug report open for that: #16644: Installation of clean OSX 10.12.4 fails. 6, but VirtualBox will *not* boot from such an ISO for reasons yet unknown. WARNING: The script will work with OSX 10.12.4.

Create a bootable mac usb with vertual bax