Where to get Yosemite 10.10 .dmg file ...

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

iMac (24-inch Early 2009), OS X Mountain Lion (10.8.5), 4GB RAM

Posted on Dec 17, 2014 4:14 AM

Reply
32 replies

Dec 17, 2014 5:19 AM in response to James 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.)

Dec 17, 2014 6:51 AM in response to James Minor

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.

Dec 17, 2014 8:31 AM in response to kahjot

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 2, 2015 9:47 PM in response to James Minor

Hello,

after OS X 11 El Capitan has been released i cant' find anymore the OS X 10 yosemite.
I would like to install OS X 10 on a secondary HD to test how it works with my mac pro quad (early 2009). and to have an additional OS so i can chose if to work wit 10.7 or 10.10. Does anyone Knows where i can find it? on App store i can only find the new version. thank you.

Oct 29, 2015 8:34 AM in response to Stefan Peterson

Stefan Peterson wrote:


Will this work with Unibeast?


Unibeast implies you intend to try running it on a 'Hackintosh' this is in breach of Apple's EULA and as such illegal.


It should be noted also that the 10.10.5 Combo update is precisely that an update, it is not a full-blown installer. The full-blown installer can only be downloaded from the Apple Mac App Store using the App Store icon running on a real Mac.

Nov 1, 2015 7:43 PM in response to CGlider

Yosemite as a full install is no longer available. Unless you have downloaded it previously, you can't get it.


@ compros:


You will need to use recovery and erase your entire hard drive in order to go backwards. You can do it as you have previously downloaded it, but it is rather involved and you will need at least one current backup before erasing your drive. You might want to consider troubleshooting your El Capitan install instead.

Dec 6, 2015 9:14 PM in response to babowa

Thanks. I run a production studio, I hold off on updates until the next gen is rock solid. We're upgrading to Logic X which requires 10.9 but Yosemite is preferred.


Therefore this situation is completely ridiculous and must be rectified by Apple. I only have a small window between jobs to get this upgrade done and tested. Not to mention the learning curve.


Unacceptable!


I've sent in my feedback.

Dec 6, 2015 10:41 PM in response to act before you think

Yes, that would be nice but the user is also responsible to check on things; I got the message when they removed Mavericks as soon as Yosemite was introduced more than a year ago. So I downloaded it right away. Another way to work it is to either use an external hard drive or a partition and install/use the newer OS on it to "test drive" it. That way you don't mess up your production system.

Dec 7, 2015 3:13 AM in response to babowa

babowa wrote:


Yes, that would be nice but the user is also responsible to check on things; I got the message when they removed Mavericks as soon as Yosemite was introduced more than a year ago.


Glad you have so much time to verify such things. The App store system was new to me at the time. The only information there was, was marketing for new features and a button marked "upgrade".


babowa wrote: use an external hard drive or a partition and install/use the newer OS on it to "test drive" it. That way you don't mess up your production system.


I keep a full backup of everything using Carbon Copy Cloner which does incremental backups ( thankfully) and archiving of older deleted files.

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Where to get Yosemite 10.10 .dmg file ...

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