10.6.1 | 10.6.3 v1.1 Delta and 10.6.3 v1.1 Combo | 10.6.4 Combo, 10.6.4 Delta, 10.6.4 Mac Mini Mid 2010 | 10.6.6 Delta, 10.6.6 Combo | 10.6.7 for early 2011 MacBook Pro, 10.6.7 Combo, 10.6.7 Delta, 10.6.7 font update to all previous updates | 10.6.8 delta v1.1 (7/25/2011) and Combo v1.1 (7/25/2011), and the followup Thunderbolt update for 2011 iMacs and MacBook Pros for installation after 10.6.8 |