Steffen M. wrote:
Therefore my question to the community: Is there any possibility to run the most recent version of Mac OS 10.7 (10.7.5) on the latest model of ther Mac Mini? Is it worth the time to try to install them from a boot device containing all recent updates of 10.7 (which means 10.7.5) or to image their disk from an older Mac Mini (Mid 2011, MacMini5,2)?
The Mac Mini comes pre-installed with OS X that is specific to that model. So, a version of OS X (e.g. Lion) purchased from the App Store or from another Mac Mini (e.g. 2011 models) won't run on your 2012. The hardware is different on the 2012 models compared to prior models. You could try to run Lion from an external drive that has a clone from a 2011 model Mac Mini. No guarantee it will work.