Your mouse touches the screen edge → iPad Sidecar snaps to that side. Automatically.
Apple didn't build this, so I got frustrated and built it myself.
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You're using your iPad as a second screen with Sidecar. You pick it up and move it to the other side of your MacBook. Now you have to manually open System Settings → Displays → Arrange and drag the little display icon. Every. Single. Time.
This is 2026. That's unacceptable.
SidecarSnap watches your mouse cursor. When you push it against the left or right edge of your screen for half a second, the Sidecar display automatically jumps to that side.
Push mouse → LEFT edge (0.5s) = iPad arranges to the LEFT ◀
Push mouse → RIGHT edge (0.5s) = iPad arranges to the RIGHT ▶
You'll also see a Dynamic Island-style black blob emerge from the bezel. As you hold the mouse, it grows, giving you a smooth visual timer.
| Feature | Description |
|---|---|
| 🖱️ Auto-Arrange | Mouse edge detection → instant Sidecar repositioning |
| 💧 Dynamic Blob | Smooth, bezel-attached indicator shows timer progress |
| 🌐 3 Languages | English, 한국어, 日本語 — switchable from menu |
| 👻 Hide Icon | Hide the ugly menu bar icon with one click! |
| 🚀 Launch at Login | Starts automatically with your Mac |
| ⚙️ Adjustable Delay | 0.3s / 0.5s (default) / 1.0s |
| 📱 Manual Control | [ and ] keyboard shortcuts |
Option A — Direct Download (recommended)
- Open the DMG file and drag
SidecarSnap.appto/Applications - Open it and follow the setup guide
Important
First-time Launch Security Warning Since this is a free open-source project and not signed with a paid Apple Developer Account ($99/year), macOS will show a warning: "SidecarSnap is damaged and can't be opened."
Don't worry, the app is not damaged! You can easily open it in 10 seconds without any terminal commands:
- Click Cancel on the warning popup.
- Open System Settings ➔ Privacy & Security.
- Scroll down to the Security section.
- Click "Open Anyway" next to the blocker message.
- Authenticate with your password / Touch ID. You're good to go! (You only need to do this once).
Option B — Build from Source
git clone https://github.com/Kimsharrrk/SidecarSnap.git
cd SidecarSnap
./build.sh
open SidecarSnap.appStep 1 — Connect your iPad via Sidecar (Control Center → Screen Mirroring → your iPad)
Step 2 — Grant Accessibility permission when prompted (required for mouse tracking)
Step 3 — That's it. Push your mouse to the screen edge.
SidecarSnap lives in your menu bar as a small icon.
To hide it: Just click the SidecarSnap menu bar icon and select "Hide Menu Bar Icon".
Honestly? We recommend hiding it. The icon is kind of ugly.
We tried. We're developers, not designers. 🤷
Note: If you hide the icon and need to change settings later, just re-open the SidecarSnap app from your Applications folder. The icon will reappear!
- macOS 13 (Ventura) or later
- An iPad that supports Sidecar (iPad Pro, iPad Air, iPad mini 5+, iPad 6th gen+)
- Both devices logged in with the same Apple ID
NSEvent.addGlobalMonitorForEvents(.mouseMoved)
↓ mouse reaches ≤2px from screen edge
↓ 0.5s debounce timer + edge glow progress
↓ CGBeginDisplayConfiguration()
CGConfigureDisplayOrigin(sidecarID, newX, 0)
CGCompleteDisplayConfiguration(.forSession)
↓ HUD overlay animation
Uses only public CoreGraphics APIs. No private frameworks. No kernel extensions. No magic.
Copyright © 2026 Kimsharrrk. All rights reserved.
Feel free to share and repost as much as you like—I’d love for this to spread far and wide! All I ask is that you clearly credit the source. However, modifications and unauthorized redistribution are strictly prohibited.
Built by a MacBook + iPad user who was tired of clicking through System Settings.
If this saved you time → ⭐ Star it. It means a lot.