Close the lid. Keep it working.
NoNap is a small macOS menu-bar and Windows tray utility for long-running local work. Turn it on before closing your laptop and the system can continue compiling, downloading, training, or running an agent.
The macOS and Windows apps use their platform's native power-management interfaces. No account or telemetry is involved.
- One switch for lid-closed operation.
- A 0–24 hour countdown shown with explicit units (
10h 00m → 9h 59m) and a matching slider;0means no limit. - A configurable battery cutoff from 5% to 50%.
- Automatic stop when Low Power Mode or Battery Saver becomes active on battery.
- A display-only battery-time estimate based on native system data.
- Optional Open at Login and English / Simplified Chinese UI.
NoNap remembers a manual language selection. On first launch, it uses Simplified Chinese when the Mac's preferred language starts with zh; otherwise it uses English.
| Platform | Support | Implementation |
|---|---|---|
| macOS | Apple silicon (arm64) and Intel (x86_64), macOS 26 or later | Swift, AppKit, IOKit, pmset |
| Windows | Windows 10/11 x64 | C#/.NET 8, WPF, Windows Power APIs |
The implementations live in macos/ and windows/. They share the
same product behavior but use separate native code and release packages.
NoNap supports Apple silicon and Intel x86_64 Macs running macOS 26 or later.
Download the archive matching your Mac from Releases:
macOS-arm64 for Apple silicon or macOS-x86_64 for Intel.
git clone https://github.com/Tsan1024/NoNap.git
cd NoNap
./macos/install.shThe installer builds /Applications/NoNap.app, asks once for administrator approval, installs a narrowly scoped sudoers rule, and launches the app.
That rule permits only these two commands for the current user:
/usr/bin/pmset -a disablesleep 0
/usr/bin/pmset -a disablesleep 1
To build without installing anything:
./macos/build.shTo create a DMG:
./macos/package.shFor Developer ID signing and Apple notarization, follow Signed macOS distribution. The default build above is ad-hoc signed for local development; it is not a notarized release.
Download NoNap-<version>-Windows-x64-Setup.exe from
Releases, or use the portable x64 zip.
Windows Group Policy can prevent power-plan changes on managed computers; NoNap reports
that condition and remains off.
To build from source, install the .NET 8 SDK and run:
.\windows\build.ps1See windows/README.md for the Windows power and recovery model.
./macos/uninstall.shThe uninstaller restores normal sleep, removes the app and login item, deletes the sudoers rule, and verifies that passwordless pmset access is gone.
Lid-closed operation can increase heat and battery use. Keep the computer ventilated, choose a battery cutoff, and use a finite timer when leaving work unattended. The battery-time estimate changes with workload and never controls the safety cutoff.
See SECURITY.md for the permission model and docs/AUDIT.md for verification steps.
NoNap began as a derivative of Sleepless, created by Adam Boudjemaa. Thanks to Adam and the Sleepless project for the original menu-bar implementation and pmset approach. NoNap is independently maintained and is not an official Sleepless release. Original copyright notices are retained under the MIT license.