Currently Being ModeratedJan 15, 2013 1:37 AM (in response to Venerence)
Right the newest Mac's, which is now the new iMac, will not boot off an older version of Mt Lion.
Apple created a Special Build of ML for the newest systems that contain the correct driver package and no older build will work.
you have to use the Recovery HD to download and save the proper build of ML for those new iMac's then create another USB thumb drive. That newer thumb drive should work on the older Mac's as well. But I'm not totally sure about that.
Currently Being ModeratedJan 15, 2013 1:42 AM (in response to Venerence)
It is certainly possible that liondiskmaker will not work with the new iMacs. It uses an existing install program and I'm not sure that one is available for the new iMacs. It's likely that some software item needed by the new iMacs is not available in an existing standard ML install image.
This is just a guess, I could easily be wrong...late-2012 27" i7 iMac, 32GB, 3TB Fu, OS X Mountain Lion, iPad '4'; ATV3; mid 2012 MBA;
Currently Being ModeratedJan 15, 2013 1:50 AM (in response to crh24)
It has nothing to do with Lion Disk Maker. That is only used to Create a Boot USB thumb drive, or DVD, of the Lion/Mt Lion install files. It does not add anything to either the DVD or thumb drive you create with it.
The problem lies with the Special build Apple creates for every new Mac that comes out that has different hardware then the previously released models.
Eventually they will come out with a new updated build, like 10.8.3, that will contain all the drivers for every Mac computer ML can be installed on, Older and the newest. Until that happens there is only one way to get a version that will boot on the newest systems. And that is to use either the Recovery HD or the Online Internet Recovery system ON one of those New Mac's. Those newer Mac's are the only one that can access the Special Build needed for the new systems.