Show Dock on All Screens? Mac Settings Explained
This article explains what the “Show Dock on all screens” setting does on a Mac, how to enable or disable it, and how it behaves across multiple displays. You can turn it on in System Settings, and it makes the Dock appear on every connected display instead of only the main one.
What Does “Show Dock on All Screens” Mean?
On a Mac with multiple displays, the Dock normally appears only on the primary (main) display. The setting “Show Dock on all screens” (found in System Settings > Desktop & Dock) changes that behavior so the Dock is visible on every active display. When enabled, each screen gets its own Dock, and the Dock on each screen shows the apps that are open on that screen. This can be helpful for quickly accessing apps without moving the cursor to the main display. The setting is off by default in most macOS versions.
How to Turn It On or Off
- Open System Settings (or System Preferences on older macOS).
- Click Desktop & Dock.
- Look for the section labeled Dock.
- Toggle the switch next to Show Dock on all screens.
Changes take effect immediately—you don’t need to restart or log out. If you don’t see the option, make sure you have more than one display connected and that the displays are active (not in mirror mode). In mirror mode, all screens show the same image, so the Dock appears on all of them anyway.
How the Dock Behaves on Multiple Displays
When the setting is enabled, each display has its own Dock. The Dock shows apps that are currently running on that particular display. For example, if Safari is open on your main display and Mail is open on the secondary display, the Dock on the main display will show Safari, and the Dock on the secondary display will show Mail. Apps that are not open on a given display won’t appear in that display’s Dock. This is different from simply mirroring the main display’s Dock.
If you disable the setting, the Dock appears only on the display that is designated as the primary display. You can change which display is primary in System Settings > Displays, by dragging the white menu bar onto the display you want as primary.
Why You Might Want It On (or Off)
Enabling the Dock on all screens can be useful if you frequently work with multiple full-screen apps or if you use a second display as a dedicated workspace. For instance, if you keep your email on a secondary monitor and your main monitor for coding, having a Dock on the secondary monitor lets you switch apps without moving the cursor far.
However, some users find the extra Dock takes up screen space and prefer to keep it off to maximize the usable area on secondary displays. Also, if you use a display with a different resolution or scaling, the Dock might look smaller or larger on different screens, which can be distracting.
Common Problems and Misconceptions
One common misconception is that enabling this setting will show the same Dock on every screen. That’s not true—each Dock is contextual to the apps open on that screen. Another issue: if you have an app in full-screen mode on one display, the Dock may be hidden on that display even with the setting enabled, because full-screen apps hide the Dock by default (unless you set it to always show).
If the setting seems to have no effect, check that your displays are not in mirror mode. In mirror mode, the same image is shown on all screens, so the Dock appears everywhere regardless of the setting. Also, make sure your Mac’s display arrangement is set to “Extended Display” rather than “Mirror Displays”.
How It Works with Stage Manager and Mission Control
Stage Manager, introduced in macOS Ventura, also interacts with the Dock. When Stage Manager is enabled, the Dock may behave differently on secondary displays. In some cases, Stage Manager hides the Dock on secondary displays to reduce clutter. If you’re using Stage Manager and the Dock doesn’t appear on a secondary display, try disabling Stage Manager temporarily to see if that’s the cause.
Mission Control shows all open windows across all displays, but the Dock itself remains per-display as described. You can still use Mission Control on any display to switch between apps and spaces.
Frequently Asked Questions
Why don’t I see the option “Show Dock on all screens”?
This option only appears when your Mac is connected to more than one display and the displays are set to extend (not mirror). If you only have one display, the setting is hidden. Also, on older macOS versions (before Catalina), the option was located in System Preferences > Dock, but the function is the same.
Does enabling this setting affect performance?
No, it has no noticeable impact on performance. The Dock is a lightweight part of the system, and showing it on an additional display uses negligible resources.
Can I have different Dock sizes on different screens?
No, the Dock size is global. If you change the Dock size in System Settings, it applies to all screens. There is no per-display Dock size setting.
Will the Dock show on a TV connected via AirPlay?
Yes, if the TV is being used as an extended display, the Dock will appear on it when the setting is enabled. If the TV is mirroring your Mac’s screen, the Dock appears as part of the mirrored image.
How do I move the Dock to a different screen without this setting?
You can’t move the Dock directly. The Dock always appears on the primary display. To change which display is primary, go to System Settings > Displays, click the “Arrange” tab, and drag the white menu bar onto the display you want as primary.
Does this setting work with macOS Sequoia?
Yes, the setting remains available in macOS Sequoia and works the same as in recent versions. The location in System Settings may vary slightly, but it’s still under Desktop & Dock.
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