The best thing to do is download it once and create a bootable install USB drive from the file for all of your Macs. Apple released the new Mac OS X 10.10 Yosemite in the Mac App Store for everyone to download and install for free on October 16th, 2014, but downloading a 5+ GB file for each of your computers will take some serious time.That will be used to create the OS X installer to the removable drive: BaseSystem.dmg and the Packages. How to create a bootable USB installer for OS X Yosemite.In the following instruction, we show specifically how to make a Mac OS X bootable installation USB from El Capitan.DMG, Yosemite.DMG, Maverick.DMG or any OS X older versions on Windows PC. Home Window softwares Make Bootable Installation USB from Mac OS X.DMG on Windows PC
