Download El Capitan here. If you have a newer Mac, there is no physical option to install Mac OS versions older than your current Mac model.
About the OS X Yosemite v10.10.4 Update
But as it often happens, workarounds are possible. There is still a chance to download the installation file if you have an access to a Mac or virtual machine running that operating system.
For example, to get an installer for Lion, you may ask a friend who has Lion-operated Mac or, once again, set up a virtual machine running Lion. Then you will need to prepare an external drive to download the installation file using OS X Utilities.
Below is the detailed instruction how to do it. Now the OS should start downloading automatically onto the external drive.
Locate InstallESD. The same steps are valid for Mountain Lion and Mavericks. If your Mac runs macOS Sierra Before you do it, the best advice is to back your Mac up so your most important files stay intact. In addition to that, it makes sense to clean up your Mac from old system junk files and application leftovers.
Mac OS X (Mac) - Download
The easiest way to do it is to run CleanMyMac X on your machine download it for free here. They should have image installations going back to OS Leopard and earlier. You can also ask their assistance to create a bootable USB drive with the installation file. So here you are.
We hope this article has helped you to download an old version of Mac OS X.
Download and install older versions of OS X on a Mac
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CleanMyMac X. Your Mac.
Update from os x I have a iMac compatible with os x How do I upgrade this to OSX Mark Do you mean update your So your question is really How do I update a machine with Do i have to buy mac os x Mark Mark The easiest way to create a bootable installer is DiskMaker X the process is documented by arstechnica.