

If an error occurs while installing an update or upgrade, find out how to resolve installation issues. If you downloaded any apps from the App Store, use the App Store to get updates for those apps. When Software Update says that your Mac is up to date, macOS and all of the apps it installs are up to date, including Safari, Messages, Mail, Music, Photos, FaceTime and Calendar. (Download El Capitan from Apple’s site.) El Capitan seems to be the last release that can migrate files from Snow Leopard. Step 4 Press the 'Continue' button and wait for the installation to begin. Install Mac OS X 10.11 El Capitan on an external drive. Step 3 Once the download is done, the El Capitan installer will pop up on your screen.

Software Update will only display upgrades that are compatible with your Mac. Download OS X El Capitan 10.11.4 update Step 2 From the official El Capitan page, you can download your required version.

From the Apple menu in the corner of your screen, choose System Preferences.Then follow these steps to find and install any available software updates or upgrades. Before getting started, it's a good idea to back up your Mac.
