I upgraded my iMac from Snow Leopard to Mountain Lion today. Installation was clean and perfectly successful and now... I'm kind of disappointed. Dictation is a nice little feature that I may have fun with some time in the future. It's also nice to have a proper "maximize" button for the windows but a few things are starting to bug me in the first few hours of using ML: 1) I keep getting security notifications. "Google chrome wants permission to acces your contacts," "Alfred wants permission to access your contacts". Annoying little windows that I have to click OK on keep popping up. Hopefully these will wear off after a while, but for now they're quite displeasing to see... and my "contacts" application is empty! 2) Software Update is gone! I loved Software Update SO much! It was such a delightful, perfectly working little app. And it's been replaced with a part of the App Store which doesn't show the size of the individual downloads until I start to download them. This is quite the downgrade. RIP, Software Update! 3) Spaces is gone... I guess I'll get used to this. :/ Aside from that, I'm struggling to find any real differences to the OS overall. Some things have changed visually but... not much of an improvement, I'd say. I DO like that you can now resize the windows from ANY side or corner like in Windows 7. And Notifications looks like it could come in use once I get notified of something, but for now, I just feel kind of meh about this new OS. Thoughts?