I can't make this work. SimCity seems to hijack my iMac. I hold down option key, I select that I want to play the game in windowed mode - SimCity doesn't care & I go to full screen anyway. CMD-H or CMD-Tab don't work either - any ideas? i've never updated it, perhaps thats the problem. I'll try that and see if it works.
ps - this is with SC4 and Rush Hour.
*EDIT*- got it to work & I'm not really sure how. After I installed the updates I still couldn't play in windowed mode. messed around with the settings a bit, selected a custom window resolution and now I have SC4 in a window ... though it could have been by anything, I think that was the trick. Thanks for the hint!