Trend Micro Worry-Free Business Security 7 ADV, Win, Mac, ML, Ren. Software type: Renewal, License quantity: 10 user(s), Number of years: 1 year(s). Minimum hard disk space: 500 MB, Minimum RAM: 256 MB, Minimum processor: Intel Pentium / PowerPC. Compatible operating systems: Windows XP, Vista, 7, Mac OS X server, Snow Leopard, Leopard, Tiger