Extensions preferences
Use Extensions System Preferences to enable and disable Apple and third-party Mac extensions. Mac extensions, such as Markup, add extra functionality to apps or to the Finder.
You can also select extensions to include in the Share menu, and select widgets for Today view in Notification Center.
To open these preferences, choose Apple menu > System Preferences, then click Extensions.
Open Extensions preferences for me
All | See all extensions you installed on your Mac. These are extensions created by third-party developers. If the extension is a content extension that enables extra functionality in apps, you see an Actions checkbox below the extension. If it’s a Finder extension, you see a Finder checkbox. Select the checkbox to enable the extension. |
Actions | See all content extensions installed on your Mac. Select a content extension to make it available in apps. For example, if Markup is selected, you can draw on pictures and sign documents in Mail, TextEdit, and other apps. |
Finder (available only if you have Finder extensions installed) | See all Finder extensions installed on your Mac. Select a Finder extension to make it available in the Finder. |
Photos Editing (available only if installed) | See all Photos extensions installed on your Mac, such as Markup. Select a Photos extension to make it available in Photos while editing photos. |
Share Menu | Select the sharing extensions you want to include in the Share menu (available from the Share button
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Today | Select widgets, such as Find My Friends, to include in Today view in Notification Center. You can also show or hide widgets right in Today view. |
in the Finder and in many Mac apps).