You are still able to use the recovery USB without internet access if you just want to open Disk Utility from it for example. Instead it will download the latest version of Mountain Lion right before the installation - if the recovery USB has been created in Mountain Lion. The Recovery Disk Assistant requires just 1GB because is does not store an OS X installer image (usually named InstallESD.dmg). You can verify this in the Terminal using: diskutil list. Note that you can create the recovery USB only if you have a Recovery HD partition on your Mac. Original answer : Yes, thanks to the guys from MLPostFactor, it’s now possible to install OSX 10.8 Mountain Lion (even 10.8. You can download the official software from Apple here. While this recovery USB does not contain the installer image, it is still able to install Mountain Lion.
#Install os x mountain lion app how to
Here's a guide on how to create a Recovery USB in (Mountain) Lion: Apple's Recovery Disk Assistant Click Install for Command Line Tools will download and install in a few minutes into /Applications/Xcode.app/Contents/Developer and various system directories. My problem with this message is that the Mountain Lion installer application - which you downloaded from the App Store - is not required to create a Recovery USB after having upgraded to Mountain Lion. But the error message which you report here does not seem familiar to me: "it said that mountain lion was not found in applications" To install Mountain Lion, you need one of these Macs: iMac (Mid 2007-2020) MacBook (Late 2008 Aluminum, or Early 2009 or newer) MacBook Pro (Mid/Late 2007 or newer) MacBook Air (Late 2008 or newer) Mac mini (Early 2009 or newer) Mac Pro (Early 2008 or newer) Xserve (Early 2009) Your Mac needs: OS X v10.6. I can't exactly follow the problem you are describing.
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