You can also use gestures from your Mac’s trackpad to switch between open applications. It has been designed to reduce distraction by allowing you to focus on the current application without being distracted by other windows or notifications from other apps.

The full-screen mode is designed to make working with multiple applications at one time easier. The system was released on July 25th, 2012 and it includes a number of new features, including a full-screen mode, notification center, and a new version of Apple’s Safari web browser. Click on Continue, select the destination drive, and install.Apple released the macOS X Mountain Lion operating system for Macs. Select the orange “Mac OS X” option and you will boot into the OS X Mountain Lion installer, from here installation is the same as normal. When finished, reboot the Mac and hold down the Option key to bring up the boot menu:

Confirm that the USB drive will lose it’s data and enter the Admin password when askedĭisk Utility will now create a bootable OS X Mountain Lion installer drive out of USB drive using the disk image, this can take a little while depending on how fast the drive and Mac are but 20-30 minutes isn’t unusual.

Drag the formatted partition to the “Destination” section, then click on “Restore”.

Drag the previously mounted “Mac OS X Install ESD” image into the “Source” section.

Now select the formatted USB drive from the left side and click on the “Restore” tab.

Select the USB drive from the left menu and click on “Erase” tab, choose “Mac OS X Extended (Journaled)” as the format, then click on the “Erase” button in the corner.

Launch Disk utility and connect a USB drive to the Mac.

Make the OS X Mountain Lion Install Drive

Double-click on InstallESD.dmg to mount it on the desktop.

Open the “Contents” directory and then open “SharedSupport”, looking for a file named “InstallESD.dmg”.

Go to the /Applications/ directory and right-click on “Install Mac OS X Mountain Lion.app” selecting “Show Package Contents”.Download OS X 10.8 Mountain Lion from the App Store.Download OS X Mountain Lion and Extract the DMG File If you already have the Mac OS X Mountain Lion install DMG extracted, skip this first set of steps and jump directly to making the bootable drive below. We’ll walk through the process here, but don’t forget to check OS X 10.8 system requirements for the destination Mac before beginning. By creating a bootable install drive, you can perform clean OS X 10.8 installs, install it on separate partitions, and install OS X Mountain Lion on Macs that don’t have internet connections.

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