A tiny macOS menu bar app that keeps your Mac awake while the long jobs run —
AI coding agents (Claude Code, Cursor, Codex), local model inference, and
overnight runs, plus the builds, backups, and SSH sessions you already trust it
for. The GUI for caffeinate. Start a long agent run, walk away, and let it
finish — without your Mac sleeping and killing the session. Or point NoNap at the
run itself and let it stay awake until the job is actually done, then stop on
its own.
- ☕ Lives in the menu bar — green dot when awake, faint ring when off
- ⏱ One click to keep awake, or a timed session — presets (15 m … 8 h) or a typed custom duration — with a live countdown
- 🎯 Or keep awake until your job finishes — pick a running process (Claude Code, Cursor, Codex,
node,python,ollama…) or a PID, and NoNap stops itself the moment it exits. No more guessing a timer - 🎛 Three modes: prevent system sleep (default), display sleep, or both
- 💻 Optional Prevent sleep on lid close — survive closing the lid (VPN/SSH stay up), on battery or AC
- 🔔 Notifies you when a timer ends, and can launch at login
- 🪶 Uses native IOKit power assertions — no daemons, no polling. Remembers your mode.
Download NoNap.dmg from the
Releases page, open it, and drag
NoNap into Applications. (A NoNap.zip is also attached if you prefer.)
Apple Silicon (arm64) only.
First launch. The build is ad-hoc signed (not notarized), so macOS blocks it
once. Double-click NoNap.app, dismiss the warning, then open System Settings
→ Privacy & Security, scroll to the bottom, and click Open Anyway. After
that it launches normally.
Or skip the prompt entirely from Terminal:
xattr -dr com.apple.quarantine /Applications/NoNap.app| Mode | Keeps awake | Like |
|---|---|---|
| Prevent system sleep (default) | System; display may sleep | caffeinate |
| Prevent display sleep | System and screen | caffeinate -d |
| Prevent both | System and screen | — |
The three modes above use IOKit power assertions (like caffeinate), which only
stop idle sleep. Closing the lid forces clamshell sleep regardless — your
Mac sleeps and any VPN/SSH session drops. The only way to prevent that is
pmset disablesleep, which needs root.
Prevent sleep on lid close is an opt-in setting that does this while NoNap
is on. It runs pmset -a disablesleep, so it works on battery and AC (below
20% on battery it's skipped, to avoid overheating a closed MacBook). NoNap applies
it when a session starts and releases it when you Stop, a timer ends, a watched
process exits, or you Quit.
Because pmset needs root, the first time you enable it NoNap runs a one-time
setup (one password prompt) that adds a sudoers entry whitelisting only the
two pmset disablesleep commands:
you ALL=(root) NOPASSWD: /usr/bin/pmset -a disablesleep 1, /usr/bin/pmset -a disablesleep 0
After that it's silent — no password, and nothing can block an unattended auto-stop. To remove the permission later, delete the file:
sudo rm /etc/sudoers.d/nonapCaveat.
disablesleepis system-wide and sticky. If NoNap is force-quit while a session is active with this on, your Mac won't sleep until it's cleared — relaunch NoNap and Stop, or runsudo pmset -a disablesleep 0.
Requires Xcode 16+ / Swift 6.
git clone https://github.com/barvhaim/nonap.git
cd nonap
swift run # run directly (menu-bar accessory, no Dock icon)
./Scripts/make_app.sh # build a NoNap.app bundle
./Scripts/make_dmg.sh # build a drag-to-install NoNap.dmg
./Scripts/package_zip.sh # build + zip to NoNap.zip for sharingTo confirm it's holding a power assertion while active:
pmset -g assertions | grep NoNapIssues and PRs welcome — the whole app is a handful of small Swift files under
Sources/NoNap/. See RELEASING.md for how releases are cut.
MIT © barvhaim