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OS 10.14.6 Today my mouse disappeared and when I pressed the space bar, the page I was viewing went up and down. I tried charging my mouse twice but could not recover my mouse. I phoned my son who after querying the problem said I should hold down the command & control button plus shutting down the computer. This produced a black screen along with the sound of being rebooted. After doing this three times, I still didn't have my mouse. A window said to make sure my mouse was discoverable...without the mouse, I couldn't do it. I then shut off the power to everything and after about 30 seconds, I switched it back on again, I could see that my router was rebooting/recharging. I then did the command & control thing and this time upon rebooting, I regained my mouse. Question: What happened that caused my mouse to disappear? I've the mouse disappear before but not to this extent...any comments?

jaybass