Frozen black arrow on screen, mouse not working

Hold down the power button for about 10-15 seconds to shut the computer down. Then restart and test. If you continue to have problems, please state what they are and we can provide more troubleshooting steps.

I also have this problem. Cursor had been lagging/freezing/disappearing for approx 1 week. Yesterday it remained stuck in top left corner. SMC and NVRAM reset did nothing. spoke to an advisor by phone, we put the computer into voiceover mode but then couldnt movr the cursor with Vo commands to click the continue button to reinstall Mac OS Monterey. Turned computer off, when I came back a couple of hours later the mouse was working again. Then today it stopped again. was able to turn on mouse keys and update to Monterey 12.1. Shut down the computer and then rebooted. Mouse/cursor still not working. Am using my iphone as a mouse to be able to send this. Computer is an iMac 27” retina late 2015 model.

Although you have the same symptoms, please create your own thread. The reason being is your issue may have the same symptoms but it has a completely different cause so that would be confusing to the OP. Once you do, someone will be happy to assist.