macOS High Sierra

Set up content caching

To learn more about how content caching works, and best practices, see About content caching.

For more information about the kinds of files you can use with content caching, see the Apple Support article Content types supported by the caching service.

If you provide content caching for clients with custom public IP addresses, you need to add or edit a DNS TXT record for your content cache. See Enable content cache discovery across multiple public IP addresses.

Enable content caching

  1. Choose Apple menu > System Preferences, then click Sharing.

  2. In the service list on the left, select the Content Caching checkbox, then wait for the content caching indicator to turn green.

  3. Restart the client devices that will use the content cache.

    Restarting the client devices ensures that they discover the content cache immediately. If the client devices are not restarted, it will take some time before they discover the content cache.

Disable content caching

  1. Choose Apple menu > System Preferences, then click Sharing.

  2. In the service list on the left, deselect the Content Caching checkbox.

Select a volume for caching

By default, the cached content is stored on the boot volume. If you have additional volumes available on your Mac, you can choose where to store the cached content.

  1. Choose Apple menu > System Preferences, then click Sharing.

  2. Select Content Caching, then click Options.

  3. Click the Edit button next to Cache Location.

  4. Select a storage volume, then click Move.

    Content caching stops temporarily while the existing cache is moved to the new location.

Set the cache size

You can choose the amount of storage your Mac uses for cached content.

  1. Choose Apple menu > System Preferences, then click Sharing.

  2. Select Content Caching, then click Options.

  3. Use the slider to set the cache size.

For more information, see Content caching storage options.

Manage iCloud caching

iCloud caching stores the files users have in iCloud, such as Pages or Numbers documents.

All cached iCloud content is received, stored, and transmitted encrypted, and the content cache does not have the ability to decrypt it.

  • Choose Apple menu > System Preferences, click Sharing, select Content Caching, then select “Cache iCloud content.”

    If you disable this feature, all cached iCloud data is immediately removed from the content cache.

If you enable or disable iCloud content caching, you might want to restart the client devices. Client devices automatically discover changes, but it takes some time. However, if you restart the client devices, they will discover the changes immediately.

Share cached content with iOS devices

You can share a computer’s Internet connection and cached content with iOS devices that are connected using USB.

  • Choose Apple menu > System Preferences, click Sharing, select Content Caching, then select “Share Internet connection.”

Delete all cached content

  1. Choose Apple menu > System Preferences, then click Sharing.

  2. Select Content Caching, then click Options.

  3. Click Reset, then click Reset again to verify the request.