On two occasions I allowed someone to get into my computer to resolve a
Problem. One person I know very well , no problem. The other was
Someone who owned a computer repair shop where I use to live.

When I sign on, the box for team viewer with the arrow going both ways
Has a black dot under it and it jumps up and down. Could this mean
Someone is getting into my computer.

The other black dot is my Safari... no other black dots.
I have a MAC air