I have a secondhand iMac machine which is currently doing nothing but booting into Recovery Mode at startup.

I am attempting to perform a completely fresh/install of the Operating System to restore full functionality of the machine.

Using the information that was provided by this answer to a similar question, I have created an installation media using TransMac on an external USB from my Windows-based machine for 'Mac OS X Lion'.

My issue is that the Installation Media/USB is not being displayed in the boot menu at startup - thus preventing me from performing the OS install.

What I have tried:

  • attempted Internet Recovery (machine appears not to support this method)
  • following the steps here
  • partition the USB drive with GPT

Not sure where to go from here or what other steps to take to clean install the Operating System.

  • Precisely which Mac is it? If you can't tell without getting into the OS, then try Everymac's Ultimate Mac Lookup tool to identify it. I've never tried TransMac, but this & other sites are littered with tales of it not working - whether user error or app fail is often hard to tell. The precise model/age of the Mac will give us more to go on.
    – Tetsujin
    Sep 16, 2020 at 8:47

1 Answer 1


I just found AnyBurn. Maybe this is what you are looking for. It supports burning dmg-files on a PC and it can create bootable USB-sticks. Best of all: it's free

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