Why is side car laggy when I use my Mac and iPad, the Mac screen is fine but my iPad is the one at like 25-30 fps it looks like. I am using a MacBook Air M4 2025 and an iPad 11th Gen A16, it worked perfectly with my iPad 9th gen.
[Re-Titled by Moderator]
Original Title: Laggy Side Car
iPad, iPadOS 27
Hi,
Sidecar lag on an iPad 11th Generation paired with a MacBook Air M4 generally stems from three main factors: wireless interference on your local Wi-Fi, the iPad’s 60Hz display limitation causing a perceived stutter, or a known bug where the Mac's automatic brightness setting interferes with cursor tracking.
1. Perceived Lag vs. Actual Performance
The iPad 11th Generation relies on a 60Hz display. Because the MacBook Air M4 pushes much higher refresh rates, moving a window or cursor from your Mac to the iPad can create the illusion of lag or choppiness simply due to the refresh rate mismatch.
2. Wireless Interference & Bandwidth
Sidecar uses Wi-Fi and Bluetooth to communicate. If your local Wi-Fi network is congested or you have heavy Bluetooth interference, the screen mirroring will drop frames and stutter.
3. Automatic Brightness Bug
A frequently reported issue on Reddit is that the MacBook's ambient light sensor causes cursor stuttering. Whenever your Mac's screen brightness shifts, it briefly stutters the Sidecar connection.
4. General Software Glitches
Many users note that Sidecar can become inconsistent across different OS versions, freezing or lagging after an hour of use.
Hi,
Sidecar lag on an iPad 11th Generation paired with a MacBook Air M4 generally stems from three main factors: wireless interference on your local Wi-Fi, the iPad’s 60Hz display limitation causing a perceived stutter, or a known bug where the Mac's automatic brightness setting interferes with cursor tracking.
1. Perceived Lag vs. Actual Performance
The iPad 11th Generation relies on a 60Hz display. Because the MacBook Air M4 pushes much higher refresh rates, moving a window or cursor from your Mac to the iPad can create the illusion of lag or choppiness simply due to the refresh rate mismatch.
2. Wireless Interference & Bandwidth
Sidecar uses Wi-Fi and Bluetooth to communicate. If your local Wi-Fi network is congested or you have heavy Bluetooth interference, the screen mirroring will drop frames and stutter.
3. Automatic Brightness Bug
A frequently reported issue on Reddit is that the MacBook's ambient light sensor causes cursor stuttering. Whenever your Mac's screen brightness shifts, it briefly stutters the Sidecar connection.
4. General Software Glitches
Many users note that Sidecar can become inconsistent across different OS versions, freezing or lagging after an hour of use.
Why is Side Car laggy on iPad 11th Gen with MacBook Air M4 2025?
