"Why are the fans going? I've only got Slack open."
A Docker VM from Monday is still building. Steamie points at it.
A menu bar app for Macs that run hot
Something on your Mac is still running.
The emulator from Tuesday. The dev server from last week. Steamie lives in your menu bar, shows what's heating your Mac and eating its battery and disk, and frees it in one click.
macOS 26 on Apple Silicon · 4 MB · No account, no card
Right now
23W
Warm at 71°C
Left running
4- Android emulator · Pixel_829 hours · trailmix 6.2 GB
- OrbStack VM2 days · background 4.1 GB
- iOS Simulator · iPhone 1736 hours · iOS 26.5 3.2 GB
-
pnpm dev4 hours · lemonade-stand
:30011.1 GB
All clear. 14.6 GB back and about 22 more minutes of battery.
It's a demo. Go on, stop something.
- Asks before it stops anything
- Nothing leaves your Mac
- Uses under half a watt itself
- Free. Pro is $19 once, never a subscription
Sound familiar?
Your Mac isn't slow. It's carrying things.
"100% at lunch. 20% by three. I didn't do anything."
Steamie shows which apps drained it since you unplugged, and what woke it overnight.
"Disk full. Again. Where did 60 GB go?"
Old Xcode builds, simulators you'll never boot, package caches. Steamie finds them.
How it works
One glance at the menu bar. One click to fix it.
Left running
Find the things you forgot.
Emulators, simulators, VMs, dev servers and helper daemons that outlived the work they were for. Steamie names each one, shows which project it belongs to and how long it's been up, and stops them one at a time or all at once.
- Knows Android emulators, iOS simulators, Docker and OrbStack VMs, Gradle daemons and dev servers
- Shows the memory each one holds, and the battery you'd get back
- Pin the ones you want kept
Right now
See what's heating it, in watts.
Not a vague CPU graph. Steamie measures power the way your Mac does and puts the number in the menu bar. When it climbs, you see which app is behind it, and "Calm" moves it to the efficiency cores so it keeps working, slower and cooler.
- Live watts, chip temperature and fan speed
- Groups helpers under the app that started them, so Chrome is one line, not forty
- Learns what's normal for your Mac, and tells you when something runs away
Cleanup
Get gigabytes back, without the guesswork.
Developer caches pile up quietly: Xcode builds for projects you deleted, device support for old iOS versions, simulators that can't even boot any more. Steamie tells you what each one is, when you last used it, and what happens if you clear it.
- "Unused" means untouched for a month or replaced by something newer
- Won't touch anything Xcode or Gradle is using right now
- Everything goes to the Trash, with Put Back one click away
Battery
Know where the battery went.
Since you unplugged: which apps used the most, and how much went to the screen. Overnight: how long it really slept, how often it woke in the dark, and who woke it.
- Time left, health and cycle count at a glance
- Overnight drain explained: "woke 23 times, mostly Spotlight"
- A year of daily history, so slow decline doesn't sneak up on you
Servers
Every localhost, by project.
Which port is which, which project it's from, and whether it's open to everyone on your Wi-Fi. Open it in a browser or stop it from the same place.
- Flags servers listening on the whole network, not just your Mac
- Spots what's keeping your Mac awake when it should sleep
ShortcutsAsk Siri "What is heating my Mac in Steamie", or use it in your own shortcuts.
Control CenterLive watts and the culprit, one swipe away.
TerminalJSON for your own scripts and dashboards.
Is it safe?
Careful by design.
An app that can stop processes and clear files should earn your trust. Here's how Steamie does.
- It asks first. Nothing is stopped, shut down or cleared until you say so, unless you've made a rule for it yourself.
- It can't break macOS. System processes are off limits. Steamie only touches things that belong to you.
- Files go to the Trash. Cleared caches can be put back from the Trash until you empty it, and in-use ones can't be cleared at all.
- Calming is undone on quit. Slowed apps get full speed back the moment you restore them or quit Steamie.
- It stays on your Mac. No account, no analytics, no tracking. It only goes online to check your licence and for updates.
- It watches its own weight. Steamie measures itself like every other app and keeps under half a watt on average.
Pricing
Free to use. Pay once if it earns it.
Every download starts with 14 days of everything. After that, the free version keeps going for as long as you like.
Steamie
Free
Forever
- Live watts in the menu bar
- What's heating your Mac, app by app
- Calm a hot app in one click
- See what's left running
- Battery time left and health
- Control Center and Terminal
Steamie Pro
$19 USD
Once. Not a subscription.
- Everything in Steamie, plus:
- Free it all: stop forgotten emulators, servers and daemons
- Servers by project, with network exposure
- Battery since unplugging, and overnight drain
- Cleanup for Xcode, simulator and package caches
- Auto-Calm and runaway alerts
- Shortcuts that calm or stop the hottest app
Starts when you open the app. No card needed.
Questions
Before you download
Will it stop something I need?
Only if you tell it to. Steamie lists what's running with how long it's been up and which project it's from, and you choose what to stop. Pin anything you always want left alone. It won't touch system processes, and it asks before stopping anything.
Does Steamie itself slow my Mac down?
It has a budget: under half a watt on average and 5% of one core. It measures itself the same way it measures everything else and shows you the result in Settings. With no window open, it checks every 10 seconds.
What happens after the 14-day trial?
The Pro features lock and the free ones carry on. No card was taken, so nothing is charged. If you liked Pro, it's $19 once, with no subscription.
Does it send my data anywhere?
No. Everything Steamie measures stays on your Mac. It only goes online to check your licence with Polar, our payment provider, and to check for updates. There's no account and no analytics. The privacy policy has the details.
Which Macs does it run on?
Macs with Apple Silicon (M1 or later) running macOS 26 Tahoe or newer. Intel Macs aren't supported, because the power readings Steamie relies on come from Apple's chips.
Do I need to be a developer?
No. Anyone whose Mac runs hot or whose battery vanishes gets a lot from the menu bar and the Overview. The emulator, server and cache features shine if you do write code.
How do I uninstall it?
Quit it from the menu bar, then drag Steamie from Applications to the Trash. If you want its history gone too, delete ~/Library/Application Support/Steamie.
Give your Mac a breather.
Two minutes to install. You'll probably find something in the first ten seconds.
macOS 26 on Apple Silicon · 14 days of Pro included