Touchpad is not working correctly
When i use touchpad to open folders, it doesn't work. But when i use it to open programs it works
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Did you try to start up in safe mode and see if your trackpad is working?
How to use safe mode on your Mac - Apple Support
Did you check the correct setup in the System Preferences?
Change Trackpad preferences on Mac - Apple Support
If your MacBook still has the Intel processor, an SMC reset might also help: