Instead of just asking you for permission to launch an app for the first time, Mountain Lion will check its security settings to see what sorts of apps are allowed to launch. Located in the General tab of the Security & Privacy preference pane is a setting called “Allow applications downloaded from,” with three options:
Anywhere: This choice uses the same set of rules as every previous version of Mac OS X. If an app isn’t known malware and you approve it, it opens.
Mac App Store: When this choice is selected, any apps not downloaded from the Mac App Store will be rejected when you try to launch them.
Mac App Store and identified developers: This is the new default setting in Mountain Lion. In addition to Mac App Store apps, it also allows any third-party apps that have been signed by an identified developer to run.
Steve Jobs, staring down death, had just received a new liver. He lay in a Memphis hospital bed in 2009, floating in and out of consciousness, but he was alert enough — and acting like Steve Jobs, authoritarian design sage — that he pronounced an oxygen mask totally unacceptable. He disapproved of the design.
Just remember, the Mac App Store is one of many ways to buy software for your Mac, and the sandbox restrictions only affect software sold / bought through the Mac App Store. Your freedom as a consumer still remains!
This means the following Macs which are supported under OS X Lion will not be able to run Mountain Lion (model identifiers in parentheses):
Late 2006 iMacs (iMac5,1, iMac5,2, iMac6,1)
All plastic MacBooks that pre-date the aluminum unibody redesign (MacBook2,1, MacBook3,1, MacBook4,1)
MacBook Pros released prior to June 2007 (MacBookPro2,1, MacBookPro2,2)
The original MacBook Air (MacBookAir1,1)
The Mid-2007 Mac mini (Macmini2,1)
The original Mac Pro and its 8-core 2007 refresh (MacPro1,1, MacPro2,1)
Late 2006 and Early 2008 Xserves (Xserve1,1, Xserve2,1)
Update: It slipped my mind that there were two pre-unibody plastic MacBooks introduced between the aluminum MacBook and the plastic unibody redesign, both of them with the model identifier MacBook5,2. Those MacBooks, which still feature the legacy pre-unibody case design and were manufactured in early- to mid-2009, are supported in Mountain Lion because they feature an NVIDIA GeForce 9400M graphics card instead of the integrated Intel GPUs in their predecessors.
OS X Mountain Lion will be Mac Store only, Apple tells us USB key will not be available
Interesting. I wonder if future MacBooks will even ship with restore media. These things are kind of becoming hybrid cloud/traditional computers.
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