Health · Sensors and battery
Mac health: the sensors that matter, read and explained
A Mac running hot, a fan spinning up, a battery that no longer lasts as long as it used to: these signals are worth understanding before you try to fix anything. macOS exposes part of this information, but it is scattered across System Settings, System Information and Activity Monitor. MacNeat's Health feature brings it together in one place: temperatures, fans, SSD status and battery, with an explanation of what is normal and what deserves your attention.
This feature is a read-only tool. It does not control the fans, does not change any energy setting and does not promise to magically extend the life of your hardware. Its job is to give you a clear picture, then point you to the right steps.
Temperatures: putting heat in context
MacNeat reads the temperature sensors available on your model (processor, graphics, storage, enclosure depending on the Mac) and shows them with their recent history. Numbers alone say little: an Apple silicon chip that climbs noticeably during a video export is working as designed, and the system lowers clock speeds on its own if needed.
What deserves attention is a high temperature at idle, or one that stays high long after a task has finished. In that case MacNeat suggests looking at background processes with Élan, checking that the vents are not blocked and that the Mac is not sitting on a soft surface.
Fans: real speed, hands off
On Macs with fans (MacBook Pro, iMac, Mac mini, Mac Studio, Mac Pro), MacNeat shows the speed of each one in revolutions per minute. MacBook Air models with Apple silicon have no fan: the section simply says so instead of showing empty values.
- A fan spinning fast during a heavy workload is normal.
- A fan that is repeatedly loud at idle often points to a process working in the background, or to dust.
- A fan stuck at 0 rpm under high heat, on a model that has one, warrants a visit to an authorised service provider.
MacNeat never forces fan speeds: that remains macOS's job, designed to protect the hardware.
SSD status
Internal storage is a component that wears slowly as data is written. MacNeat shows the status reported by the drive itself (SMART status, also visible in System Information) and, when the controller provides them, wear indicators such as total data written or the percentage of rated life used.
For most people, these values change very slowly and pose no problem over a Mac's normal lifespan. They are mostly useful to spot abnormal behaviour, such as heavy writes caused by a swap file that keeps growing when memory runs short. Remaining disk space is tracked in Bilan.
Battery: cycles and capacity
On a MacBook, MacNeat shows the charge level, the number of cycles completed and the current maximum capacity compared with the original capacity. This matches what System Settings (Battery > Battery Health) and System Information report, shown side by side.
- One cycle means using 100% of the capacity, possibly spread over several charges.
- Apple states that batteries in recent MacBook models are designed to retain 80% of their original capacity at 1,000 cycles.
- macOS Optimized Battery Charging, on by default, limits the time spent at 100% to reduce wear.
When the cycle count gets high, a recommendation appears in Bilan inviting you to keep an eye on the battery. MacNeat does not claim to "repair" a battery: it helps you know where you stand and when to consider a replacement.
Three clear levels, and the usual principles
Each indicator is summarised by a level: Excellent, Good or Watch. You see at a glance what is fine, and the details remain available if you want exact values.
- Local data: measurements are read and kept on your Mac.
- Free to view: health information is part of the free scan. Cleanup actions offered elsewhere require a license (7-day trial).
- Apple silicon and Intel: available sensors vary by model, and MacNeat only shows what your Mac actually provides.
If a slow Mac is what worries you, our guide slow Mac: what to do complements these indicators.