Where to get Yosemite 10.10 .dmg file ...

You can download Yosemite 10.10.1 from the Purchases tab of the App Store. No need to apply your update.

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.

In addition to John Lockwood's excellent advice, you can also use a formatted USB thumb drive or external drive and a Terminal command as outlined here.

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.

OS X Yosemite 10.10.5 Combo Update

If you haven't downloaded it before, it is not available. If you have check the App Store Purchases tab.

I have not previously downloaded Yosemite, and as you said cannot find it on the App Store. Please could you tell me is there some other way I can download it from Apple as I mistrust 3rd party sources?

Will this work with Unibeast?

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.

BACKGROUND: I periodically reformat and partition the hard drive on my iMac ... followed by reinstalling OS X and software.

I do not know why you do that. Seems like a left over Windows thing. From my experience and readings of these forums, there is no need to periodically reload Mac OS X.

R

OS X Yosemite 10.10.5 Combo Update is an "UPDATE". I'm missing something. This link downloads a 2Gig update file and does not solve the question of getting a 10.10.dmg file.

Still searching. I cannot find Yosemite in the AppStore either. I never should have gotten suckered into updating to Capitan. 😟

After I installed Captain E!, my machine boots randomly creating a very unreliable work experience. I really want to go back to Yosemite as it was very stable. This OS does not give new feature and also not stable for someone to work.

My readings here says that you can use App Store to re-download Yosemite. Might look in download apps.

R