How to add a Left widget in Mac Notification Center

The Mac Notification Center has a widget panel you can open with a single click on the clock. Here's how to add Left widgets to it so your countdowns are one swipe away while you work.

Requirements

Left widgets in Notification Center require:

• macOS Sonoma (14) or later — widgets got a major upgrade in Sonoma
• Left installed on your Mac — Left is available on the Mac App Store as a universal purchase with the iOS app
• Your Mac and iPhone should be signed into the same Apple ID to sync events via iCloud

Step 1 — Install Left on your Mac

Left is a universal app — if you've purchased it on iPhone or iPad with the same Apple ID, it's available on Mac at no extra cost. Open the Mac App Store, search for "Left", and click Get or the iCloud download button.

Step 2 — Open Notification Center

1. Click the date and time in the top-right corner of your menu bar.
2. The Notification Center panel slides in from the right.
3. Scroll to the bottom of the panel and click Edit Widgets.

Step 3 — Add Left widgets

1. In the widget editor, search for "Left" in the search field or scroll to find it.
2. Click the + button on a Left widget to add it, or drag it into the Notification Center panel.
3. Left offers small and medium widget sizes — add as many as you like.
4. Click Done when finished.

Step 4 — Configure which event to show

1. Right-click (or Control-click) a Left widget in Notification Center.
2. Select Edit Widget.
3. Choose the event to display, or leave on Smart for automatic selection.
4. Click outside the widget to save.

Tips for Mac users

• You can rearrange widgets in Notification Center by dragging them up or down.
• Clicking a Left widget in Notification Center opens the Left app directly.
• For a permanently visible countdown on your Mac desktop, see the Mac desktop widget guide.
• Left syncs events from your iPhone via iCloud — any countdown you create on your phone appears on Mac automatically.