MacBook Neo – Persistent Cursor Lag
Since the cursor lag persists across macOS 26 and 27.2, occurs regardless of which applications are running, and isn't accompanied by unusual Activity Monitor readings, I'd focus on isolating whether the cause is background software, macOS or hardware.
Test in Safe Mode
Shut down your Mac. Hold the power button until startup options appear. Select your startup disk, hold Shift and select Continue in Safe Mode.
Use the Mac for at least 30–60 minutes, or long enough for the issue to normally reappear. If the problem disappears, a background service or third-party component may be responsible.
Apple: Start your Mac in Safe Mode
Test with a new user account
Go to System Settings > Users & Groups and create a new standard user account. Log into it and use the Mac without installing applications or changing settings.
If the problem disappears, something in your original user profile may be responsible. If it persists, a system-wide macOS issue becomes more likely.
Check for hardware or graphics issues
Consider whether the cursor is actually freezing or whether its visual movement is simply stuttering. A graphics or cursor-rendering issue could potentially cause this without producing unusual CPU or memory activity.
To check for hardware faults, run Apple Diagnostics. Shut down the Mac, hold the power button until startup options appear, then press Command (⌘) + D.
Apple: Run Apple Diagnostics
Consider reinstalling macOS
If the issue persists in Safe Mode and a new user account, consider reinstalling macOS through Recovery. Back up your data first. Choose Reinstall macOS without erasing the disk.
Apple: Reinstall macOS
Report the issue to Apple
Given that the problem has persisted across multiple macOS versions, consider submitting a bug report through Feedback Assistant, ideally including a sysdiagnose.
Apple: Feedback Assistant
My recommendation: Start with Safe Mode and a new user account. If the cursor continues lagging in both environments, run Apple Diagnostics and contact Apple Support. At that point, I'd request an investigation into a potential macOS-level issue rather than continue repeating settings adjustments and temporary workarounds.