Mac User Guide
- Welcome
- What’s new in macOS Sequoia
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- Intro to Continuity
- Use AirDrop to send items to nearby devices
- Hand off tasks between devices
- Control your iPhone from your Mac
- Copy and paste between devices
- Stream video and audio with AirPlay
- Make and receive calls and text messages on your Mac
- Use your iPhone internet connection with your Mac
- Share your Wi-Fi password with another device
- Use iPhone as a webcam
- Insert sketches, photos, and scans from iPhone or iPad
- Unlock your Mac with Apple Watch
- Use your iPad as a second display
- Use one keyboard and mouse to control Mac and iPad
- Sync music, books, and more between devices
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- Control what you share
- Set up your Mac to be secure
- Allow apps to see the location of your Mac
- Use Private Browsing
- Keep your data safe
- Understand passwords
- Change weak or compromised passwords
- Keep your Apple Account secure
- Use Mail Privacy Protection
- Use Sign in with Apple for apps and websites
- Find a missing device
- Resources for your Mac
- Resources for your Apple devices
- Copyright
About USB on Mac
Your computer may have USB ports that let you easily connect external devices, such as a keyboard, mouse, trackpad, printer, iOS or iPadOS devices, or a digital camera, without needing to restart your computer. The USB ports provide some power, so most devices don’t need their own power cords. You may be able to purchase adapters that let you connect non-USB devices to a USB port.
Note: Your Mac may also have one or more Thunderbolt or USB-C ports. See About the Thunderbolt ports or About the video ports.
USB devices and Mac laptops
If you have a Mac laptop, USB devices can cause your computer’s battery to become depleted faster. If you plan to use the device for an extended period, it’s a good idea to connect the computer’s power adapter.
Disconnecting USB storage devices
Before you unplug a USB storage device while your computer is on, eject the device by dragging it to the Trash.
Connect multiple devices
You can connect more than one device to a USB port by using a USB hub. Connect the devices to the USB ports on the hub, then connect the hub to the computer. Most USB hubs have a power adapter and should be plugged into an outlet.
Be sure to connect USB 3.0 SuperSpeed devices to a USB 3.0 SuperSpeed HUB, USB 2.0 Hi-Speed devices to a USB 2.0 Hi-Speed hub, and so on.