Hello, I am looking for an APC UPS that will allow my Mac Mini and Thunderbolt display to safely shut down using the Mac built in software. Can someone recommend an APC model that will be appropriate for this purpose. The UPS should be able to support a single Mac Mini and a Thunderbolt display for atleast 5-10 mins, and must also have a connection which will let the computer know when it is using the backup battery (in order for the Mac to shut down). Can someone please guide me on some APC models which would allow this, and will a 1000 VA model be enough or will i need a larger 1500 VA one. Thanks in advance.