iStat Menus 7.50 — Mac version

iStat Menus is a system monitor that lives in your Mac’s menu bar, putting live stats a glance away.

Pick the module that answers a question you already have

Open the app and you’ll see a long list of modules — CPU, memory, disks, network, sensors, battery, weather and time. Don’t switch everything on at once. Pick the one that answers a question you already have, like “Is my Mac swapping memory?” or “How hot is it running?”.

A CPU history graph reveals background task spikes instantly

Each module can show a compact icon, a text readout, or a tiny graph in the bar. The graphs are the real gem. A CPU history graph, for example, shows you at a glance whether a background task has been pegging a core for the last hour. Click any item to drop down a larger, detailed panel.

What’s the most useful thing for an older Mac?

The memory pressure graph. If the line sits in the green, you’re fine. If it nudges into yellow or red during everyday tasks, that’s your cue to close a few browser tabs before the machine starts crawling. The disk activity indicator is a close second — a constantly lit read/write light often points to a misbehaving app.

Can it help with overheating?

Yes. Enable the sensors module to show CPU or GPU temperature directly in the bar. Pair that with the fan speeds readout. If the temp climbs high and the fans stay stubbornly quiet, you know to check for fluff in the vents or a runaway process.

A glance in the bar tells admins if a server process is hogging bandwidth

System administrators tend to love it. A glance at the menu bar tells them whether a server process is hogging bandwidth, or if disk I/O has spiked on a Mac that should be idle. They often set up the network module to show per-app data use — handy when troubleshooting a sluggish remote connection.

Video editors and motion designers get plenty from the GPU and memory readouts. Rendering a timeline and seeing the memory pressure climb into yellow explains a choppy preview faster than any activity monitor buried in a submenu. Some keep the CPU temperature front and centre during long exports, purely for peace of mind.

Curious tinkerers — the sort who open up old MacBooks to re-paste the heat sink — are perhaps the happiest group. The sensors module feeds their habit. Fan speeds, CPU proximity temperatures, battery cycle counts and voltage readings are all there, no terminal commands needed. If you trawl forums where people swap logic boards and debate thermal pads, you have probably seen screenshots of iStat Menus sitting in the corner.

Even a casual user who simply wants to know why the fans are roaring gets a clear answer. A temperature spike plus a runaway process visible in the CPU dropdown makes the mystery short work.

MenuMeters stops at core graphs—no sensors or fan control

MenuMeters is the old guard. It puts CPU, memory, disk and network graphs in the menu bar, much like the core iStat modules, but it stops there. No sensors, no weather, no fan control. MenuMeters is lighter and open source — great if you want bare network ticks and nothing else — but it gives you far less detail when something goes wrong.

Stats is a newer, free menu bar monitor. It covers CPU, GPU, memory, network, disk, sensors and battery. The design is clean and the app is actively maintained. Where iStat Menus pulls ahead is depth: Stats shows you sensor values, but iStat Menus lets you configure fan speed rules per battery state and graphs temperature history over time. If you are chasing intermittent overheating, that history matters.

Sensei shares a few features — disk health, temperature monitoring, fan control — but it is built more as a Mac cleaning and optimisation dashboard. Its menu bar presence is thinner than iStat Menus. Sensei suits someone who wants drive trim status and cache clearing alongside temperatures. iStat Menus suits someone who wants live stats always visible without opening a separate window.

Start with temperature, memory and network to answer most questions

On day one, pick three modules. Something temperature-related, something memory-related, and the network graph. That trio answers most questions without cluttering the bar. You can always add weather or the astronomy item once the machine is behaving.

Spend ten minutes in the settings for each module. The “Combine into one menu bar item” checkbox appears in several places — use it. A single CPU icon that expands to show cores, load and temperature is far tidier than six separate widgets fighting for space.

If the helper tool asks for permission to access sensor data, grant it. Without the helper you lose temperatures, fan speeds and voltage readings. The prompt looks like a standard macOS security dialog because that is exactly what it is.

On an Intel Mac that runs warm, set a gentle fan curve in the sensors module. Something like “start ramping at 60 °C, max out at 80 °C” stops the machine from cooking before the built-in profile kicks in. Test it with a HandBrake encode — watch the graph, listen to the fans, tweak until the noise-versus-heat trade-off feels right.

• New Astronomy item with moon and sun info
• Added forecasts for seeing, transparency, cloud cover and observing conditions

• macOS 11 (Big Sur) or newer
• Apple Silicon or Intel Mac