The way keyboard shortcuts are represented on Mac is one of the things which is actually really user-unfriendly in OSX. I'm supposed to just know that an arrow means shift, a weird line means option/alt, the command key symbol, theres also a caret which means... something? And, to make it worse, most of the keys don't actually have their symbols printed on them, at least with the retina MBP.
That is unfortunate. I have a 2011 MBP with a UK keyboard, and all the special keys have the symbols on them, except for Control.
The way the shortcuts are shown in menus has always seemed like a nice, clear and space-efficient way of doing it. It seems a shame that Apple doesn't put the symbols on all its keyboards, because without those, new users are not going to know what the menu shortcuts are referring to.