Here are some impressions, based on my limited experience with Mountain Lion on two of my computers. So far it seems to be stable and to be an improvement over Lion.
- 13" MacBook Pro w/ 8GB RAM, 2.7GHZ Core i7, mid-2011
- Mac Mini w/ 8GB RAM, 2.7 GHZ Core i7, mid-2011
- Make sure your hardware supports Mountain LIon
- Download Mountain Lion
- Make a backup USB Flash Drive after downloading and before installing
- Then, install Mountain Lion
- Trouble-free installation
- Fast – At first, spotlight indexing may slow things down. Performance tests (xbench, geekbench) were better for Moutain Lion with a dozen apps running than for Lion with one.
- New Tools and Apps
Information About Selected Apps
- Safari - Unified Safari Address/Search Bar
- AirPlay - You can easily connect to an Apple TV to mirror your display - Extremely easy
- Docs in the Cloud - iWork, TextEdit, and other apps can now store docs in iCloud
- Sharing - Sharing available from Finder and most apps
- Notes: list formatting, image support, iCloud sync (was in Mail)
- Reminders —Separate app (was in iCal). Drag an email into Reminders to create a note
- Text Dictation – like on iPhone. I’ve tested w/ mail and Notes.
- Notification Center - Notification Center, also an iOS 5 features, enables you to preview your e-mail messages, calendar alerts, Twitter notifications, and more, by simply clicking a button in the upper right side of your desktop.
- Save As… is back (Sort Of) - You’ll find it via System Preferences > Keyboard > Keyboard Shortcuts, and can read more here.
- Ability to Encrypt any disk
- Security has been increased - Gatekeeper, sandboxing, low-level OS changes, daily software updates
- Power Nap - things work while your laptop sleeps
Features Removed (partial list)
- RSS in Safari (and Mail).
- Safari’s Activity Viewer.
- Using a laptop with the lid open, but with just an external display active.
- The Safari search box.
- (The GUI to) Web sharing.
- iChat. iChat’s functionality has been subsumed into Messages.
- Automatic document locking. Lion would lock documents after 14 days to avoid inadvertent changes. You can still manually lock files from the Finder using the Get Info option, or with a little menu that drops down from the file’s name in the title bar when you hover the pointer over it (in conforming applications).
- Network Dementia? - some reports of WiFi connecting after long sleep. Discussion
- Shorter Battery Life? – (Note Lion had the same complaints when first introduced.) May be temporary due to spotlight indexing, virus scanning, certain apps. Discussion
- Adobe Creative Suite Users – some reports of problems, although Adobe says CS is compatible. Discussion
- Mountain Lion Mail may perturb mail sending behavior: if you have multiple accounts outgoing mail is handled differently than before . Discussion