After installing macOS Catalina my internal keyboard suddenly stops working.

Boot into Safe Mode (Use Safe Mode to isoloate issues with your Mac) and test the keyboard from there. Reboot normally and test again.

NOTE: Safe Mode boot can take up to 10 minutes as it's doing some system cache cleaning, volume verifying and directory repairing. 

I suggest you use the program created by Etresoft, a frequent contributor.  It will provide a snapshot of your system which we can analyze to possibly determine the cause of your problem. Please use copy and paste as screen shots can be hard to read. On the screen with Options, please open Options and check the bottom 2 boxes before running. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown.

https://itunes.apple.com/us/app/etrecheck/id1423715984?mt=12

Use the Add Text button to include the Etrecheck report in your reply.

CleanMyMac is one of the worst pieces of software you can install on your Mac. Please do the following suggestion so that we can find out what damage it has done to your system.

I suggest you use the program created by Etresoft, a frequent contributor.  It will provide a snapshot of your system which we can analyze to possibly determine the cause of your problem. Please use copy and paste as screen shots can be hard to read. On the screen with Options, please open Options and check the bottom 2 boxes before running. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown.

https://itunes.apple.com/us/app/etrecheck/id1423715984?mt=12

Use the Add Text button to include the Etrecheck report in your reply.

Old Toad, regarding antivirus, would you care to elaborate as to why? Because the security content posted for every Mac OS patch would beg to differ. There are exploits out there, and those exploits are used to install malware. https://support.apple.com/en-us/HT210634

There are no known viruses for Macs. There is adware and malware but the antivirus apps aren't designed to look form then and often give false positives. They also hog system resources thus compromising system performance.

If you're concerned about adware or malware then the free version of Malwarebytes is what you'd want to use. It was developed by a long time contributor to these forums and a highly respected member of the computer security community.

All you have to do is search the Apple Support Communities for anti-virus or a particular app and you'll find time after time situations where the software was the center of the problem.

This is what you should know and do: Effective defenses against malware and other threats - Apple Community



Uninstall CleanMyMac4 using the uninstall procedure form the developer. CMM4 is a piece of junk that only causes problems on Mac.

After you get CMM4 uninstalled, reboot Mac and run EtreCheck again and post new report here. Hopefully with CMM4 removed we might be able to find the rest of the problems.

I have the same problem and know quite a few others that are also experiencing it.

When the system starts-up, close your laptop lid for a few minutes. Open it back up and the keyboard and trackpad will start working again. Very annoying, but not as bad as Apple's decision to move to ZSH for no reason other than to move from a shell that is well supported on nearly every environment to a boutique shell that may or may not be available on other systems.

I am facing this annoying problem ... and I called the service more than 2 times and I have spoke with them for more than 1 hour each time without any solution ... and I should wait 2 days to go to apple service to solve this problem... what a shame to use Mac Pro latest version and I should wait 2 days to solve this problem... I am very upset with the service...

Hello,

I'm a macbook pro early 2015 user, i got the catalina update few days ago, the update wasn't causing any issues on the first day and, later i installed CleanMyMac and did a little cleanup recommended by it. Then i removed it from mine by hitting only the delete key, next day the keyboard freezes at random times.

Then i downgraded to macos mojave but the issue still continues. Is there anything i can do to fix this issue...?

Thanks.

I remove the macbooster and all other similar apps from mac and that resolved my issue, and i was able to work with trackpad and keyboard. BUT TODAY THEY RELEASED NEW UPDATE AND AFTER THAT AGAIN SAME ISSUE. Now what i am suppose to remove?????????

I'm having keyboard issues as well on a 2014 Macbook Pro Retina and its internal keyboard. I'm getting seemingly random characters typed in when I'm typing, though it looks like it has something to do with me using the delete key. Any time I delete something to make a correction, it's like what I deleted might be injected later at random. I don't have any cleaning utilities installed, and the only software that I have that has requested access to the keyboard buffer was the Wacom tablet driver. I've denied that access request. I have no idea what else could be doing this.

I had the same issue. I couldn't log on cause my keys weren't working. I restarted it and that didn't even work. I then started to hit control + (letter key), option +(letter key), command + (letter key) and it just somehow started working >.<

so annoying but I hope it doesn't continue.