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Clapet is a utility that aims to improve clamshell mode on your Macbook by automatically managing sleep when an external display is detected

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Clapet icon

 Clapet

Clapet is a utility that aims to improve clamshell mode on your Macbook.

Clamshell mode on mac keeps your mac awake when you close the lid but it only works when a power adapter is connected. This app aims to solve this problem by allowing clamshell mode even on battery.

When an external display is detected while on battery or power adapter, the application will disable sleep so you can use your computer with the lid closed, and as soon as the external display is unplugged, sleep will be enabled again to preserve battery.

After macOS updates you may have to go through the Manual configuration step again

Features

  • Automatically disable sleep if an external display is connected
  • Disable sleep for a specified amount of time
  • Manage sleep through shortcuts

Installing

You can download the app from the release tab or by clicking this link link directly.

When the application is done downloading, you can open the zip file and move the Clapet.app file it to the Application folder on your mac and run it for the first time.

You may be unable to start the application since I do not have an Apple Developper licence, to fix this problem you can right click the application and click Open, your mac should then allow you to bypass the security warning. Due to the way it works, Clapet can also not be submitted to the AppStore.

Manual configuration

When launched the application will ask you to configure the pmset utility, if you skipped it you can still do it from the advanced tab in settings or you can do it manually by following the instructions below.

The application uses the command line utility pmset to work. This utility requires root permissions to be ran. If no changes are made the application will ask for password each time it either disables or enables sleep which can get annoying.

In order to disable password requirement to run pmset you will need to edit the sudoers file. Running the following command will open the sudoers file in Vim, you can choose another editor by setting the EDITOR variable before (for example EDITOR="nano" sudo visudo)

sudo visudo

Then add the following line at the bottom of the file and replace username by your username

username ALL = NOPASSWD : /usr/bin/pmset

You should now be able to run sudo pmset without entering your password. The configuration in this step may get erased after a macOS upate, you should do it again if the app starts asking for permissions again.

Uninstalling

If you want to uninstall the app, remove the line added in the sudoers file mentioned in the Manual configuration section and delete the application from your computer.

Contributing

Any kind of contribution either through pull requests or simple issues describing a feature you'd like to have in the application or a problem you get when using it are welcome.

License

This project is licensed under the terms of the GNU GPLv3 license

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Clapet is a utility that aims to improve clamshell mode on your Macbook by automatically managing sleep when an external display is detected

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