MacBook Trackpad Not Working — Causes, Fixes, and When to Get It Repaired

What a MacBook Trackpad Fault Actually Means

Before assuming the trackpad needs replacing — which is an expensive repair on most MacBook models — it’s worth understanding what’s actually happening. MacBook trackpad faults fall into a small number of distinct categories, and most of them don’t require a new trackpad.

The trackpad itself is a glass surface over a Force Touch sensor array (on 2015 models onward) or a mechanical click mechanism (on older machines). The cursor movement is capacitive — it detects the electrical change from your finger. The click is either a physical mechanism or a haptic simulation. Faults in either of those systems produce different symptoms.

The Most Common Causes — in Order of Likelihood

1. Swollen Battery

This is the first thing to check, and it’s the most common cause of a MacBook trackpad that suddenly won’t click.

The battery in a MacBook sits in the base, directly beneath the trackpad. As lithium cells age and degrade, they can swell. When they do, the battery expands upward — pushing against the trackpad from below. The pressure prevents the trackpad from physically depressing or, on Force Touch models, disrupts the sensor alignment enough to cause erratic behaviour.

Signs this is the cause:

• The trackpad click has become progressively harder or now feels completely solid
• There’s a visible gap between the MacBook’s bottom case and the upper case
• The trackpad glass feels raised compared to the surrounding surface
• The MacBook doesn’t sit flat on a table anymore

A swollen battery is not just a trackpad problem — it’s a safety concern. Lithium batteries under pressure can in rare circumstances rupture. If you suspect swelling, stop using the machine on soft surfaces (like a bed or your lap, which can compress the case further) and get it assessed promptly.

The fix: replace the battery. In many cases, this resolves the trackpad fault entirely without touching the trackpad.

2. Loose or Damaged Trackpad Cable

The trackpad connects to the logic board via a ribbon cable. On MacBooks, this cable runs under the battery and can loosen if the machine has been dropped, flexed, or previously repaired. A partially connected cable causes intermittent cursor behaviour — the cursor freezes, jumps, or the trackpad stops registering touches momentarily.

This is a shorter, cheaper repair than a trackpad replacement — the cable itself is inexpensive and fitting it is relatively straightforward on most models. If you’ve recently had any repair work done or the machine took a knock, this is a plausible cause.

3. Force Touch Sensor Failure

MacBooks from 2015 onward use Force Touch — the trackpad doesn’t mechanically click; it simulates a click using a haptic actuator. The “click” you feel is vibration. If the Force Touch sensor fails, the trackpad may register movement but won’t register clicks, or the haptic feedback disappears.

This is distinguishable from a battery swelling issue because the trackpad glass won’t be raised and there’s no obvious pressure. A failed Force Touch sensor usually requires a trackpad replacement on most models, though on some MacBook Pro configurations the trackpad can be replaced independently of the top case.

4. SMC or Software Fault

Sometimes trackpad problems aren’t hardware at all. A corrupted SMC (System Management Controller) can cause the trackpad to behave erratically — particularly after a macOS update or an unexpected shutdown. Symptoms: the trackpad works intermittently, freezes for several seconds at a time, or loses click functionality entirely even though the hardware seems physically intact.

Try an SMC reset before bringing the machine in:

For MacBooks with Apple Silicon (M1, M2, M3): Simply shut the machine down and leave it off for 30 seconds. Apple Silicon Macs handle SMC function differently and there’s no manual reset procedure.

For Intel MacBooks (2018 and later with T2 chip): Shut down. Press and hold the power button for 10 seconds. Release, wait a few seconds, then press power to start normally.

For Intel MacBooks (pre-2018): Shut down. Hold Shift + Control + Option + Power simultaneously for 10 seconds, then release all and press power to start.

If the trackpad behaviour improves after an SMC reset, the fault was firmware rather than hardware. If the problem returns, there’s likely an underlying hardware issue causing the SMC corruption.

5. Physical Damage to the Trackpad Glass

A crack in the trackpad glass — from a drop, a compression impact, or pressure applied at a specific angle — can cause the trackpad to register phantom touches or stop responding in the damaged area. The glass surface is part of the capacitive sensing system, and damage disrupts the electrical field it relies on.

This is visually obvious and requires a trackpad replacement.

6. Liquid Damage Affecting the Trackpad Connector

If liquid entered the keyboard area, it can travel down onto the trackpad connector and cause corrosion that disrupts the connection. The trackpad may stop responding entirely or behave erratically, and the fault may worsen over time as corrosion develops.

If there was a liquid incident before the trackpad fault appeared, mention it — it changes the diagnosis approach significantly.

What to Try Before Bringing It In

1. Check if it’s a physical or software issue. Connect a USB or Bluetooth mouse. If cursor movement works normally with the external mouse, the trackpad hardware or its connection is the issue. If the external mouse also behaves oddly, it’s more likely a software or logic board fault.

2. Check Trackpad settings in System Preferences. It sounds obvious, but settings can change — particularly after a macOS update. Go to System Preferences (or System Settings on macOS Ventura and later) → Trackpad and verify that tracking speed and click settings look normal.

3. Reset the SMC as described above. This resolves a meaningful proportion of post-update trackpad faults.

4. Boot into Safe Mode. Hold Shift while starting the MacBook. If the trackpad works normally in Safe Mode, a third-party application or extension is causing the fault in normal boot. Identifying and removing that application resolves it.

5. Check for battery swelling. Place the MacBook on a flat surface and try to spin it. If it rocks, the bottom case is no longer flat — consistent with battery swelling. Don’t keep using the machine if you suspect this.

When It Needs to Come In

If the steps above don’t resolve the fault, or if you suspect battery swelling, the machine needs a hands-on assessment. What we do:

• Inspect for battery swelling and test battery health
• Check the trackpad cable connection
• Test Force Touch sensor function
• Run Apple Diagnostics for hardware fault codes
• Assess for liquid or corrosion damage if relevant

We’ll tell you what we found and what the repair involves before starting anything. For most trackpad faults, the cause is identifiable in under an hour.

We’re based in Putney, SW15. Open Monday–Friday 10am–6pm, Saturday 10am–5pm. Book a free assessment or call 020 7610 0500.