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For testing purpose, I created a new user profile and the trackpad is working as usual !. However, It is still not working on my main user profile. I did the following with no success so far:

  • Re-install the macOS from the macOS recovery
  • Delete the com.apple.AppleMultitouchTrackpad plist file from the ~/Library/Preferences through two ways: file system and Default command
  • Reset the SMC
  • Reset the NVRAM

macOS Catalina 10.15.5

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  • Welcome to Ask Different. What is the file you deleted and when you say profile, how precisely do you set that up? I think you mean making a new user and starting a graphical log in, but would like to confirm. – bmike Jun 29 '20 at 1:34
  • Hi, yeah a new user. Here is the plist file I deleted and then re-started my mac (It would create the file again): com.apple.AppleMultitouchTrackpad – Maher Bouidani Jun 29 '20 at 1:40
  • I’ll presume you removed it from the filesystem instead of using the defaults command? That might be a place to start. – bmike Jun 29 '20 at 1:46
  • yeah form the file system. do you mean doing something like this instead: rm path/to/file ? – Maher Bouidani Jun 29 '20 at 1:49
  • That’s general way to break things or not fully clear preferences. I’ll start an answer with one clear option and perhaps a quick fix. If my answer isn’t correct be sure to edit your details into the question body. Many people never look at comments at all. – bmike Jun 29 '20 at 1:51
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Removing a preference list is not so good on macOS. First step is to let the database that tracks preferences to clear those entries.

defaults delete -/Library/Preferences/whatever

Since the system may not read those settings, shut down after the above. Good news is you know the hardware and OS are fine. Worst case no one can help figure out how your account is corrupt and you back up your files and restore them to the new account with the working settings.

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  • unfortunately did not work – Maher Bouidani Jun 29 '20 at 2:55
  • Copying your files will work, @MaherBouidani I’ll update if anything else comes to mind. – bmike Jun 29 '20 at 2:57
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I've not found a specific solution for this problem even after a call with a senior advisor at Apple. Being said that, the work around I did is to back up my files into iCloud Drive and then factory reset my mac book pro.

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