Check compatibility
Considered to be the classic Mac OS, it underwent multiple major releases until its final version, Mac OS 9, shipped in 1999. Apple changed its policy with the launch of Mac OS X, colloquially. Note: The headings on this list indicate the Macintosh System bundle names; the bullet points indicate the version of the System File included in that bundle. This is to make it clearer for people searching for specific bundle versions as opposed to System File versions. Finder File versions are not indicated. 1 Classic Mac OS 1.1 Macintosh System Software (0 - 0.3) 1.1.1 System File 1 1.1.2. The version was superseded by Mac OS X 10.0.0, the first final release of Mac OS X. Version 10.0: “Cheetah” Mac OS X version 10.0 is the first major release Mac OS X, which is the Apple’s desktop and the server operating system. Mac OS X 10.0 was released on March 24, 2001, for the price of US$129. At PowerMax, we sell new and used Macs. Our used Macs often come with previous versions of Mac OS X, and our customers sometimes would like to know what the differences are between different versions. The following article is a synopsis of each major OS X version since OS X 10.4 Tiger.
You can upgrade to OS Yosemite on any of the following Mac models. Your Mac also needs at least 2GB of memory and 8GB of available storage space.
MacBook introduced in 2009 or later, plus MacBook (13-inch, Aluminum, Late 2008)
MacBook Air introduced in late 2008 or later
MacBook Pro introduced in mid 2007 or later
Mac mini introduced in early 2009 or later
iMac introduced in mid 2007 or later
Mac Pro introduced in early 2008 or later
Xserve models introduced in early 2009
MacBook Air introduced in late 2008 or later
MacBook Pro introduced in mid 2007 or later
Mac mini introduced in early 2009 or later
iMac introduced in mid 2007 or later
Mac Pro introduced in early 2008 or later
Xserve models introduced in early 2009
If you need older versions of OS X, they can be purchased on the Apple Online Store: Lion (10.7) Mountain Lion (10.8) What you will receive: When ordering Lion or Mountain Lion, you will receive an email with a redemption code for use with the Mac App Store. Problems with Mac OS X. For support for OS X Mountain Lion refer to Mountain Lion Support.
To find your Mac model, memory, storage space, and macOS version, choose About This Mac from the Apple menu . If your Mac isn't compatible with OS X Yosemite, the installer will let you know.
Make a backup
Before installing any upgrade, it’s a good idea to back up your Mac. Time Machine makes it simple, and other backup methods are also available. Learn how to back up your Mac.
Get connected
It takes time to download and install OS X, so make sure that you have a reliable Internet connection. If you're using a Mac notebook computer, plug it into AC power.
Download OS X Yosemite
For the strongest security and latest features, find out whether you can upgrade to macOS Catalina, the latest version of macOS.
Apple Os X Version List
If you still need OS X Yosemite, use this link: Download OS X Yosemite. A file named InstallMacOSX.dmg will download to your Mac.
Os X Version 10.12 Download
Install the macOS installer
Double-click the downloaded file to open a window showing its contents. Then double-click the file within, named InstallMacOSX.pkg.
![Apple Os X Versions In Order Apple Os X Versions In Order](https://upload.wikimedia.org/wikipedia/commons/thumb/f/fe/MacOS_Version_History.svg/1280px-MacOS_Version_History.svg.png)
Current Apple Os Versions
Follow the onscreen instructions, which will guide you through the steps necessary to install.
Begin installation
After installation of the installer is complete, open the Applications folder on your Mac, then double-click the file named Install OS X Yosemite. Imovie app apple.
Click Continue and follow the onscreen instructions. You might find it easiest to begin installation in the evening so that it can complete overnight, if needed.
Allow installation to complete
![Apple Apple](https://level2forex.com/images/level2-xstation-broker.jpg)
Please allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart, show a progress bar, or show a blank screen several times as it installs both OS X and related updates to your Mac firmware.
Learn more
- OS X Yosemite won't install on top of a later version of macOS, but you can erase your disk first or install on another disk.
- You can use macOS Recovery to reinstall macOS.