CURSOR/KEYBOARD KEEP FREEZING
I have a Mac OS Mojave 10.14.6 early 2015. Roughly 3 weeks ago the cursor began to freeze in the upper-left corner on the login page, this has happened 4 times. I was able to fix the first 3 times by shutting my Mac off, then turning it back on while holding down the caps lock until the login screen appeared. I had to do this 2-3 times before it worked. On September 12, 2019 it happened a fourth time and again was able to fix by repeating above steps a few times. After it was fixed I installed the most recent update and immediately on restart the cursor was frozen but now the problem and solution have changed.
The caps lock key no longer works as a solution, but holding the spacebar to enter in Safe Mode works but not always. The update was done, the cursor was "fixed" and I was back to using my Mac, then the cursor and keyboard froze. This was the first time the cursor froze during use along with the keyboard. I couldn't use control, alt, esc and I had to hold down the Power button to shutdown my Mac. I tried to reboot in Safe Mode several times and it didn't work. As well as trying the caps lock key, resetting PRAM, SMC several times each off and on over a 5 hour period. Then today I turned my Mac on in Safe Mode and it worked on the first shot!
Can anyone tell me why this is happening? Why did the original issue started as stated in the first paragraph? Why I'm having a different issue now? Also why doesn't the solution fix the problem the first time? How can I prevent this from happening again? I'm so confused.