BACKGROUND: I periodically reformat and partition the hard drive on my iMac ... followed by reinstalling OS X and software. QUESTION: Where can I get the .dmg file for Mac OS X Yosemite 10.10 so I can reinstall Yosemite from an external hard drive where 10.10 will be located. I do have the .dmg for 10.10.1 but this is an update. My understanding is that I have to have 10.10 installed in order to apply the update so using 10.10.1 to reinstall Mac OS X Yosemite is not an option. Please don't ask WHY do you want to do this. Thank you for your help. J. Minor After the download has finished, and the installer launches, do not allow it to go ahead and install. Quit at the first screen and save a copy of the installer app to a safe location outside of your applications folder. After you have stashed a copy, go ahead and run the installer that is in your Applications folder. (You may have noticed that for reasons that are hard to fathom, the installer app gets deleted at the end of the installation process.) If you download the Yosemite installer from the App Store you can use DiskMaker X to make a bootable installer disk which can either be a USB memory stick or a volume on a hard disk. You can also make a disk image which would be usable to restore a fresh never booted copy of Yosemite, this would typically be used with DeployStudio or maybe JAMF Casper Suite. This can be done using AutoDMG. However such a disk image can also be used with VMware Fusion and Parallels to create a Mac virtual machine. DiskMaker X, AutoDMG and DeployStudio are free. Thanks kahjot .... I had OS X Maverick installed on one partition of my external HD. So I downloaded Yosemite 10.10 and, like you said, quit the Installer. I moved the file "Install OS X Yosemite (5.17 GB) to a safe location on the HD of my iMac and also to my external HD. As a note - the file OS X Yosemite 10.10 build 14A389 dmg.dmg was located in the Trash. When the .dmg is expanded it creates a file named "macvexe". I also saved this .dmg file to the HD of my iMac and also to my external HD. Thanks John Lockwood ... I will be downloading DiskMaker X to make a bootable installer disk for my external HD. Thanks keg55 ... Thanks for the reference "How to make a bootable OS X 10.10 Yosemite install drive" published October 18, 2014 in the on-line version of MacWorld. All best for a happy and safe holiday season to you all, Jim Minor
Oct 16, 2014.. Now that OS X Yosemite is available, many users may wish to create a. Couldn't mount dmg /Volumes/Install OS X Yosemite/Install OS X ..
Where to get Yosemite 10.10 .dmg file ... | Apple Support Communities
Oct 17, 2014.. Build a clean OSX 10.10 Yosemite Image with AutoDMG, which allows you to add in packages and OS updates. This process needs to be done ..
Oct 17, 2014.. My question is how do I get the OSX Yosemite offline installer to.. In previous versions I get the ESD dmg file that contains everything that I ..
Creating a bootable installer disk lets you install Yosemite on multiple Macs and also makes a handy emergency drive. Here's how to set one up.
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Hey! I know it seems dummy, but i have been searching the whole week on the internet for OSX Yosemite 10.10 iso/img/dmg file. And i couldn't ..
Jan 28, 2015.. Download, install or update OS X Yosemite (Mac) - Apple's latest.. OSXUpdCombo10.10.2.dmg - updated this afternoon that does work on ..