MenuBarHider hides menu bar icons on macOS 27, where Hidden Bar, Ice and most other managers stopped working. Two separators live in your menu bar: everything between | and » is hidden, one click on » brings it back, and it folds away again after a timeout.

  [always visible]  |  [hidden]  »  [always visible]      expanded
  [always visible]  »  [always visible]                    collapsed

No Screen Recording permission, no screenshots of your menu bar, no telemetry. Accessibility permission only.

macOS 27 rewrote the menu bar: every status item used to be its own window, now the whole bar is one window drawn by MenuBarAgent. Tools that inflated a status item's width (Hidden Bar) or dragged item windows off screen (Ice, old Bartender) became no-ops overnight. MenuBarHider talks to MenuBarAgent directly, the same way the paid managers that survived do, but it is small, open and free.

Requires macOS 27. Download MenuBarHider-x.y.z.zip from the latest release, unzip it and drag MenuBarHider.app to Applications. The app is signed with a Developer ID and notarized, so it opens without Gatekeeper warnings.

On first launch grant Accessibility in System Settings → Privacy & Security → Accessibility. The app picks it up within two seconds, no restart needed.

Needs Xcode 26.3 or newer and xcodegen.

brew install xcodegen
git clone https://github.com/happy666End/MenuBarHider.git
cd MenuBarHider
make install        # builds Release, copies to /Applications, launches

The default build is ad-hoc signed, which works everywhere but has one drawback: every rebuild produces a new signature and macOS forgets the Accessibility grant. If you have an Apple developer certificate, sign with it so the grant survives rebuilds:

make install SIGN_IDENTITY="Developer ID Application" TEAM=XXXXXXXXXX
# or put those two lines into local.mk (git-ignored) once

1. ⌘-drag the » separator to the right of the icons you want to hide.
2. Click » to reveal them, click again to hide, or wait for the auto-hide timer.
3. While expanded, a second separator | appears. ⌘-drag it right past any icon that should stay visible even though it sits left of ».

Right-click either separator for the menu:

The hidden set is recomputed every time the bar collapses, so reordering icons while it is expanded just works. Apps launched while the bar is collapsed stay visible until you move them behind the separator.

flowchart LR
    AX[Accessibility<br/>item positions] --> HC[HidingController]
    SEP["| and » positions"] --> HC
    HC -->|allow-list| BR[MenuBarAgentBridge]
    BR -->|MBAssessmentModeAssertion| MBA[MenuBarAgent]
    MBA --> BAR[(menu bar)]

• Hiding. MenuBarAgent exposes a visibility-restriction service: "show only these system items and these bundle identifiers". Its client lives in the private MenuBarClientCore.framework as MBAssessmentModeAssertion, and it is the one service there that requires no entitlement. The app loads the framework with dlopen, builds an allow-list of every running app minus the hidden ones, and activates the assertion. Releasing it restores the bar instantly.
• Which icons. Positions of third-party items come from each app's AXExtrasMenuBar; the separators are the app's own NSStatusItems. The scan runs concurrently across apps and takes about 100 ms.
• Degradation. If Apple removes the framework or the class, the menu says Hiding unavailable on this macOS build and nothing else changes.

The restriction is what macOS uses for exam (assessment) mode, and that mode deliberately blocks Notification Center. With the restriction active a click on the clock does nothing: BetterTouchTool has exactly this bug open. MenuBarHider lifts the restriction while the pointer hovers the clock and puts it back half a second after the pointer leaves. An already-open panel survives the restriction, so widgets keep working; the price is that hidden icons show while the cursor sits on the clock.

• Private API. Apple can close it in any 27.x update; the app will report it instead of crashing, but hiding will stop until a workaround exists.
• Items without a bundle identifier cannot be allow-listed and stay hidden whenever the bar is collapsed.
• Multi-display setups are untested; the separators are measured on the primary display.

make gen      # xcodegen generate (project.pbxproj is not committed)
make test     # unit tests for the pure logic
make lint     # swiftlint + swift-format, configs are in the repo
make build    # Release build into build/
make release  # signed + notarized zip in dist/ (needs TEAM and a notarytool profile)

MIT