How to Re Download OS X Mountain Lion Installer from the Mac App Store. After youve upgraded to OS X Mountain Lion on the primary Mac you bought it from, the installer app deletes itself from your Applications folder. Download Installer For Mac Os X' title='Download Installer For Mac Os X' />This makes sense for those who only own a single Mac, but if you plan on installing OS X Mountain Lion on multiple Macs or just want to create an additional boot USB drive for installs and upgrades, its kind of annoying. If you fall into the multi Mac category or want a backup of the installer around, youll need to re download the Mountain Lion installer app from the Mac App Store you will not be charged again for redownloading heres how Launch the Mac App Store and hold down the Option while clicking on the Purchases tab. Locate OS X Mountain Lion in the list, and click on the Install button to redownload. Find the Install OS X Mountain Lion app in your Applications folder when finished downloading. Im going to walk through the process of making a bootable Mac OS X 10. Lion installation drive out of any USB flash drive key. This is similar to the. GNU Emacs For Mac OS X Pure builds of Emacs for Mac OS X. No extras No nonsense Download Emacs Version 25. Tortoise Adoption Program. Universal Binary 59. MB Released 201709. Opensc Installer For Mac Os X 10. For those with bandwidth concerns its a good idea to make a copy of the Installer app somewhere so you dont lose it again. Or just make a boot disk and not worry about it again.