Clapet For Mac

Clamshell mode on MacBook is designed to allow you to use the device with the lid closed when an external display is connected. That’s all well and good, but the problem is that it only works when the laptop is connected to a power adapter. If it’s running on battery, it will just go into sleep mode.

Clapet is a relatively simple open-source app that aims to fix this issue. It is particularly helpful on Apple Silicon Macs, since their considerable battery life means they are very much capable of powering an external display for extended periods.

When running the app for the first time, you have the option to configure the pmset utility, which allows Clapet to enable or disable sleep mode without asking for your password every time. You can install it later from the app’s settings if you skip this initial step.

Once everything is installed, sleep mode should be disabled automatically whenever you connect an external display while on battery. You can also enable or disable it manually, and you can set an inactivity delay to put the MacBook to sleep when no input is detected for a given amount of time. Lastly, you can customize menu options, set hotkeys, and manage notifications.