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Why Does Your Mac Say "Not Charging" While Plugged In?

Published August 11, 2026. Last updated August 13, 2026.

“Not Charging” in the macOS battery menu, while the charger is clearly plugged in, has four common causes: optimized battery charging holding the battery on purpose, a hot battery being protected, a charger too weak for what the Mac is drawing, or a deliberate pause while the machine is under heavy load. Only one of the four means anything is broken. Here is how to tell them apart.

Is macOS holding the battery on purpose?

Usually yes, and it is the most common cause. macOS includes battery health management and Optimized Battery Charging, which deliberately hold the battery around 80 percent when the Mac stays plugged in for long stretches, because storing a lithium battery at 100 percent ages it faster. If your battery sits near 80 percent and says “Not Charging”, that is a feature. You can confirm in System Settings, Battery, and charge to full manually when you need it.

Is the battery too hot to charge?

Lithium batteries must not be charged hot, so macOS pauses charging above a temperature threshold and resumes when things cool down. This happens on warm desks, in sunlight, or under sustained heavy load. The pause is silent in the battery menu, which is why it gets mistaken for a fault. Broken Charger shows a hot-battery pause explicitly, with a thermometer symbol in the menu bar, so a thermal pause is never misread as a broken charger.

Is the charger too weak for the load?

A Mac can draw more power than a small charger supplies. Drive a 16-inch MacBook Pro hard on a 30W phone charger and the battery will drain while plugged in; the menu says “Not Charging” because the charger is merely slowing the drain. The fix is wattage: see how many watts a MacBook charger needs. The subtle version of this is a multi-port charger sharing its output with a second device, which can quietly halve the watts your Mac receives.

How do you know which cause applies right now?

Look at three numbers: the battery percentage, the battery temperature state, and the watts actually being delivered. macOS shows the first, hides the second, and buries the third in System Information. Broken Charger’s job is to surface all three in the menu bar in plain words: what the charger negotiated, what is flowing into the battery, whether a thermal pause is active, and whether the charger is too weak or being shared. When “Not Charging” appears for a benign reason, it says so; when power is genuinely coming and going, it records every dropout and offers to find the broken part step by step.

When is “Not Charging” actually a fault?

Two patterns point to a real problem. First, power that connects and disconnects repeatedly with no one touching anything: that is a failing socket, cable, or charger, and elimination will find it. Second, a charger that negotiates far below its rating through a known-good cable, for example a 96W charger delivering 20W, which typically means the charger or cable is degraded. Both patterns are exactly what a charging monitor is for; neither is visible in the battery menu alone.

Frequently asked questions

Should I turn off Optimized Battery Charging? If the 80 percent hold annoys you, you can disable it in System Settings, Battery, but it exists to slow battery aging. A better habit is to leave it on and use “Charge to Full Now” (click the battery icon) before travel.

Does “Not Charging” appear on Intel Macs too? Yes. Battery health management shipped for Intel MacBooks in macOS 10.15.5 and the behavior carried into every Apple Silicon Mac. The four causes above apply to both.

Is it bad to keep a MacBook plugged in all the time? No. macOS manages the battery specifically for that pattern. What ages the battery is heat and time at 100 percent, both of which battery health management works to limit.

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