For a long time now, if you needed an older macOS installer (such as Sierra or El Capitan), you could visit the App Store, go to your “Purchased” page, and re-download anything you’d used in. There are different ways to download Mac OSX 10.10 Yosemite on different computer brands. We’ve compiled the steps for a Mac as well for Windows. Downloading Apple Mac OSX 10.10 Yosemite from Apple Store. The users can still find Mac OS X Yosemite Download here and its available for free download.
macOS Catalina gives you more of everything you love about Mac. Experience music, TV, and podcasts in three all-new Mac apps. Enjoy your favorite iPad apps now on your Mac. Extend your workspace and expand your creativity with iPad and Apple Pencil. And discover smart new features in the apps you use every day. Now you can take everything you do above and beyond.
Check compatibility
If you're using one of these computers with OS X Mavericks or later,* you can install macOS Catalina. Your Mac also needs at least 4GB of memory and 12.5GB of available storage space, or up to 18.5GB of storage space when upgrading from OS X Yosemite or earlier.
Mac App Store Yosemite
MacBook introduced in 2015 or later
MacBook Air introduced in 2012 or later
MacBook Pro introduced in 2012 or later
Mac mini introduced in 2012 or later
iMac introduced in 2012 or later
iMac Pro (all models)
Mac Pro introduced in 2013 or later
* To upgrade from Lion or Mountain Lion, first upgrade to El Capitan, then upgrade to Catalina. To find your macOS version, Mac model, memory, and storage space, choose About This Mac from the Apple menu . If your Mac isn't compatible with macOS Catalina, the installer will let you know. View the complete list of compatible computers.
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 macOS, so make sure that you have a reliable Internet connection. If you're using a Mac notebook computer, plug it into AC power.
Download macOS Catalina
If you're using macOS Mojave, get macOS Catalina via Software Update: Choose Apple menu > System Preferences, then click Software Update.
Or use this link to open the macOS Catalina page on the App Store: Get macOS Catalina. Then click the Get button or iCloud download icon.
Begin installation
After downloading, the installer opens automatically.
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.
If the installer asks for permission to install a helper tool, enter the administrator name and password that you use to log in to your Mac, then click Add Helper.
Allow installation to complete
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 macOS and related updates to your Mac firmware.
Stay up to date
After installing macOS Catalina, you will be notified when updates to macOS Catalina are available. You can also use Software Update to check for updates: Choose Apple menu > System Preferences, then click Software Update.
Or get macOS Catalina automatically
If you're using OS X El Capitan v10.11.5 or later and your App Store preferences or Software Update preferences are set to download new updates when available, macOS Catalina will download conveniently in the background, making it even easier to upgrade. A notification will inform you when macOS Catalina is ready to be installed. Click Install to get started, or dismiss the notification to install later. When you're ready to install, just open the file named Install macOS Catalina from your Applications folder.
Learn more
- If the installer shows a list of apps that are not optimized for your Mac, learn about 32-bit app compatibility, then choose whether to proceed with the installation.
- For the strongest security and latest features, upgrade to macOS Catalina. If you have hardware or software that isn't compatible with Catalina, you might be able to install an earlier macOS, such as Mojave, High Sierra, Sierra, or El Capitan.
- You can also use macOS Recovery to reinstall macOS.
You can upgrade to the latest version of macOS Server from the Mac App Store. If you move to a new server, you can use Migration Assistant to copy server data and settings from your previous server.
Before you begin
If your Mac uses macOS High Sierra or later, you can upgrade and migrate to the latest version of macOS Server. If your Mac uses an older version of macOS, learn how to upgrade your macOS Server from an earlier version.
Before you upgrade or migrate your macOS Server, follow these steps:
- Back up your server with Time Machine or another method.
- Make sure that your target server meets the system requirements for the latest versions of both macOS and macOS Server.
- If your server relies on DNS or DHCP servers, make sure that they're turned on during the process.
- Prepare for changes to macOS Server.

Upgrade your server
- If your Mac uses macOS High Sierra or macOS Mojave, check for any updates for macOS. If an update is available for macOS, click Update.
- Check for any updates to macOS Server. If an update is available, click Update, then open the Server app and finish the setup.
- Upgrade to the latest version of macOS Catalina.
- Update to the latest version of macOS Server.
- Open the Server app and finish the setup.
Migrate your server
You can use any one of the following sources to migrate your server data to another Mac:
- A server connected in target disk mode
- A local hard drive or volume
- A Time Machine backup
You can’t use a network connection from a Time Machine backup or an existing server to migrate a macOS Server.
Apple Store Yosemite Download Free
How to migrate your server data
- Install the latest version of macOS on the target system.
- Connect your previous server or backup device to the target system.
- Open Migration Assistant on the target system and follow the onscreen instructions.
- Select your previous server or backup device when prompted.
- When the migration finishes, install macOS Server.
- Open the macOS Server app and complete the setup.
Update your server on macOS Sierra and earlier
If your Mac uses macOS Sierra 10.12 or earlier, you have to delete the macOS Server app and your server data before you can update to the latest version. Here's how:
- Move the Server app and /Library/Server to the Trash, which deletes your Server data.
- Upgrade to the latest version of macOS and download the latest version of macOS Server.
- Launch the Server app and complete the setup.
