Hi,
If you need to use AutoCAD on both machines - according to "Autodesk SOFTWARE LICENSE AGREEMENT" you can install and activate additional copy of software:
3.1.2 Use Away from Usual Work Location.
(a)For Stand-alone (Individual) and Multiseat Stand-alone Versions. If You have acquired a Stand-alone (Individual) Version or Multiseat Stand-alone Versions, for each Permitted Number of copies of the Software, You may Install and Access, solely within Your Territory, one (1) additional copy of the Software on a second Computer provided that:
(i) such second Computer is owned or leased by You (and not by another person, such as Your employee, if any);
(ii) such second Computer is either a portable Computer or a nonserver Computer away from Your usual work location;
(iii) the additional copy of Software is Accessed solely for the purpose of enabling You (or Your employee, if any) to perform work while away from Your usual work location;
(iv) the original and additional copy of the Software are used only by the same person, and only one (1) of the Software copies is Accessed at any one time; and
(v) both copies of the Software are Installed and Accessed exclusively with the copy protection device (if any) supplied with the Software.
If you don't need to use AutoCAD on Mac mini, you can use License Transfer Utility to transfer your licence to another machine.
Maxim