Mac Update trailer

Notes

At 0:02, a window can be seen through the Sniper's scope. The colours playing on the glass allude to the 'Flying Window' logo from Microsoft 'Windows' operating system.
The bitten apple hanging from the branch alludes to both Apple's current logo, and their very first logo.
The company poster on the wall behind the Heavy reads "Jobbs' Orchards." This refers to Apple CEO, Steve Jobs.
At 0:23 is the first of many glimpses at the Frontier Justice, one of the unlockables later included with the Engineer Update.
The first hint to the existence of crates was also seen in this trailer, where the Soldier can be seen pulling various hats from a Mann Co. Supply Crate. Among these hats are the Tyrant's Helm, Texas Ten Gallon, Killer's Kabuto, and the Stainless Pot.
"Think Bullets," seen at the end of the trailer, is a reference to an old Apple slogan, "Think Different."
The music tracks used in this video are The Art of War (from Meet the Soldier) and The TF2 Theme.
At 0:05 to 0:06, the BLU Pyro running by is holding a RED Flamethrower.
When the Demoman first appears in this video, you can see that the sight on his Grenade Launcher is flipped down.
Behide the Mann Co. Supply Crate the Pyro training target can be seen.