macOS - Official Apple Support

Get Ready for macOS High Sierra

With new forward-looking technologies that improve the most important functions of your Mac, High Sierra is macOS at its highest level yet.

Get your Mac ready for High Sierra

Featured topics

Move your content to a new Mac

Use Migration Assistant to copy all of your documents, apps, user accounts, and settings to a new Mac from another computer.

Move your content

Use Time Machine to back up or restore your Mac

Time Machine backs up all of your files to an external hard drive so that you can restore them later or see how they looked in the past.

Learn how to back up

Update the software on your Mac

How to update macOS and apps from the Mac App Store.

Update your Mac

How to use Night Shift on your Mac

Night Shift automatically shifts the colors of your display to the warmer end of the color spectrum after dark.

Learn about Night Shift

Use Siri on your Mac

macOS Sierra brings Siri to your Mac and includes features from Siri on iOS as well as new capabilities designed just for your desktop.

Learn more about Siri

Free up storage space on your Mac

macOS Sierra can save space by storing your content in the cloud. And new tools make it easy to find and remove large or unneeded files.

Learn more about DSE

Use Continuity to connect your Mac, iPhone, iPad, iPod touch, and Apple Watch

Move seamlessly between your devices with Handoff, Universal Clipboard, iPhone Cellular Calls, SMS/MMS messaging, Instant Hotspot, and Auto Unlock.

Learn about Universal Clipboard

Use Photos on your Mac

Learn how to get your photos on all of your devices, manage your collection, and edit and share your photos.

Learn about the Photos app

Change or reset the password of a macOS user account

You can change the password that you use to log in to your Mac, or reset the password if you don't remember it.

Forgot login password

If you forgot your Apple ID password

If you have issues when you try to sign in with your Apple ID password, use these steps to reset it and regain access to your account.

Regain access

Two-factor authentication for Apple ID

Two-factor authentication is an extra layer of security for your Apple ID designed to ensure that you're the only person who can access your account, even if someone knows your password.

Learn about two-factor authentication

Check for Wi-Fi issues using your Mac

Your Mac can analyze Wi-Fi connections for certain issues, then recommend solutions.

Get help with Wi-Fi

Use AirDrop to send content from your Mac

With AirDrop, you can wirelessly send photos, videos, websites, locations, and more to a nearby iPhone, iPad, iPod touch, or Mac.

Learn about AirDrop

Use AirPlay to display video from your Mac on an HDTV

If you have an Apple TV, you can use AirPlay to wirelessly stream video to your HDTV from Safari or QuickTime Player, or use your HDTV as a Mac display.

Learn about AirPlay