scroll bars - show always

Apple menu  > System Preferences > General

Show scroll bars

Scroll bars appear in a window when there’s content that doesn’t fit into the window’s current size.

  • Automatically based on mouse or trackpad: Scroll bars are shown depending on the mouse or trackpad you’re using.

    If your device allows gestures, scroll bars are hidden until you start scrolling. Otherwise, they’re visible.

  • When scrolling: Hide scroll bars until you start scrolling.

  • Always: Scroll bars are always shown.

Click in the scroll bar to

  • Jump to the next page: Clicking in the scroll bar moves the content page by page.

  • Jump to the spot that’s clicked: Moves to the spot where you’re clicking; for example, if you click at the bottom of the scroll bar, you go to the bottom of the document.

To momentarily switch between scrolling methods while working, press and hold the Option key while clicking the scroll bar.

If your AirPods won't connect

If your AirPods won't connect

If you need help connecting to your AirPods, learn what to do.

Connect to your iPhone, iPad, or iPod touch

  1. Make sure that your iOS device has the latest version of iOS. Your device needs to have iOS 12.2 or later. If you have AirPods (1st generation), your device needs to have iOS 10 or later.

  2. Open Control Center and make sure that Bluetooth is on.

  3. Put both AirPods in the charging case and make sure that both AirPods are charging. Learn what to do if your AirPods or case won't charge.

  4. Make sure to select your AirPods as your audio device.

  5. Close the lid, wait 15 seconds, then open the lid. The status light should flash white, which means that your AirPods are ready to connect. 

  6. If your AirPods don't connect, press and hold the setup button on the back of the case. Hold the setup button until you see the status light flash white, then amber, and then flash white continuously.

  7. Open the case—with your AirPods inside—and hold it next to your iPhone.

  8. Follow the steps on your iOS device's screen.

  9. Test your AirPods. If you still can't connect, reset your AirPods.

Connect to your Mac

If you're using AirPods (2nd generation), make sure that your Mac has macOS 10.14.4 or later. If you're using AirPods (1st generation), make sure that your Mac is using macOS Sierra or later.

Choose Apple menu  > System Preferences > Bluetooth. If your Airpods appear in the list of devices* but they don't connect, remove your AirPods from the list:

  1. Select your AirPods in the list of devices.

  2. Click the X to the right of your AirPods.

Add your AirPods to the device list in Bluetooth preferences again:

  1. Place both AirPods in the charging case.

  2. Open the lid of your charging case near your Mac.

  3. In the device list, select your Airpods and click Connect.

Test your AirPods. If you still can't connect, reset your AirPods.

* If your AirPods don't appear in Bluetooth preferences, set up your AirPods with your Mac.

Published Date: March 28, 2019

Apple Watch Comparisons

Series/mmMatMiscWeight ThicknessWidthHeightScreen AreaNotes
S4 40mmAlumGPS30.1 oz10.7mm34mm40mm977 sq mmGPS/WiFi, Ion-X strengthened glass
S4 40mmSteelGPS38.9 oz10.7mm34mm40mm977 sq mmGPS/WiFi/Cellular, Sapphire crystal glass

Apple Watch Series 4 - Technical Specifications


GPS + Cellular

  • Stainless Steel

    • Silver

    • Space Black (DLC)

    • Gold (PVD)

  • Aluminum

    • Silver

    • Space Gray

    • Gold


  • Aluminum

    • Silver

    • Space Gray

    • Gold

Apple Watch Nike+ available in silver and space gray aluminum.
Apple Watch Hermès available in polished stainless steel.


  • GPS, GLONASS, Galileo, and QZSS

  • Barometric altimeter

  • Water resistant
    50 meters1

  • Electrical heart sensor (ECG app)

  • Optical heart sensor

  • Improved accelerometer
    up to 32 g-forces

  • Improved gyroscope

  • Ambient light sensor

  • Capacity 16GB

  • All ceramic and sapphire crystal back


  • 44mm
    368 by 448 pixels
    977 sq mm display area

  • 40mm
    324 by 394 pixels
    759 sq mm display area

  • LTPO OLED Retina display with Force Touch
    1000 nits brightness


  • S4 with 64-bit dual-core processor
    Up to 2x faster processor

  • W3
    Apple wireless chip



  • Built-in rechargeable lithium-ion battery
    Up to 18 hours3

  • Magnetic charging cable

  • USB power adapter

Case Size

Stainless Steel - 40mm

  • Height: 40mm

  • Width: 34mm

  • Depth: 10.7mm

  • Case Weight: 39.8g

Stainless Steel - 44mm

  • Height: 44mm

  • Width: 38mm

  • Depth: 10.7mm

  • Case Weight: 47.9g

Aluminum - 40mm

  • Height: 40mm

  • Width: 34mm

  • Depth: 10.7mm

  • Case Weight: 30.1g

Aluminum - 44mm

  • Height: 44mm

  • Width: 38mm

  • Depth: 10.7mm

  • Case Weight: 36.7g

  1. Apple Watch Series 3 and Series 4 have a water resistance rating of 50 meters under ISO standard 22810:2010. This means that they may be used for shallow-water activities like swimming in a pool or ocean. However, they should not be used for scuba diving, waterskiing, or other activities involving high-velocity water or submersion below shallow depth.

  2. Wireless service plan required for cellular service. Apple Watch and iPhone service provider must be the same. Not available with all service providers. Not all service providers support enterprise accounts or prepaid plans; check with your employer and service provider. Some legacy plans may not be compatible. Roaming is not available. Contact your service provider for more details. Check for participating wireless carriers and eligibility.

  3. Apple Watch All-Day Battery Life testing was conducted by Apple in August 2018 using preproduction Apple Watch Series 4 (GPS) and Apple Watch Series 4 (GPS + Cellular), each paired with an iPhone; all devices were tested with prerelease software. Battery life varies by use, cellular coverage, configuration, and many other factors; actual results will vary. See and for more information.

Apple Watch Series 4 (GPS + Cellular) requires an iPhone 6 or later with iOS 12 or later. Apple Watch Series 4 (GPS) requires an iPhone 5s or later with iOS 12 or later.
Features are subject to change. Some features, applications, and services may not be available in all regions or all languages. Click here to see complete list.