By destructatron, 20 April, 2016 Forum macOS and Mac Apps High, what is the kernel extension in no sleep? When ever I open no sleep on my Mac it says, oops, no sleep kernel extension is not loaded. Please help. Options Log in or register to post comments Comments Contact the developers of the Contact the developers of the plugin. Something did not get installed correctly somehow, or something is missing from the plugin, or apple has disallowed the action. I have tried reinstalling the I have tried reinstalling the app. Are you having problems with this app? If you aren't, try uninstalling and reinstalling the app and see if you get this problem I actually don't use the app. I actually don't use the app. But if a reinstall fails apple probably disabled this kind of app. Remember editing the kernal can have horable results if done wrong. The reinstall didn't fail. The reinstall didn't fail. When I installed it again it said, the install was completed successfully. And I still get this no sleep kernel extension was not loaded message.