Booting my MacBook Pro

[Kathsr]

I'm thoroughly stumped. I would really appreciate any input you all can give me. For some time now, every time I start up my laptop it appears to be installing something. I get the gray bar that moves from left to right which only used to happen when I was upgrading my OS. Then the startup proceeds normally. I have run 3 different malware programs including Malwarebytes, Avast and Macscan and none detected anything. Anybody have any idea what's going on?

 

[CoastalOR]

Is the bar underneath the Apple logo?

 

[Kathsr]

Yes exactly. What's it doing?

 

[CoastalOR]

It is loading the OS to complete startup. Since it continues to your desktop and you have already run checks, then I would not worry about it. Sierra is slower to load than an older OS.

 

[Kathsr]

Thank you so much