System Freezes - now what?

My new MBP had "frozen" twice now. In this state only thing I can do is move the mouse cursor, and hold down the Power button to re start.

There is no Beach Ball, or crash report and KBD is ignored.

I have done MEMTEST and Disk Verify and all seems good. How should I investigate this further???

What were you running when the Mac froze?

You could open activity monitor -> see if some process is using a bunch of CPU or Memory. If you are running out of system memory and your swap is getting large - this could be causing slowdowns.

Also - how much free disk space do you have? If you are using a lot of swap and you don't have enough disk space - you could just be flat out running out of memory.

There are a myriad of things but start with watching activity monitor. You could also try istats which give you temperature information as well.
https://www.apple.com/downloads/dashboard/status/istatpro.html

Ivan,
Thanks for your help. I am installing istatpro, now.
When the freeze happened, I couldn't open anything as the kbd was dead. So Activity Monitor was not an option. I have 16GB ram and had 120GB free space on my 480GB SSD
I was using Lightroom at the time.

Unless you were doing something else 16GB and 120GB of free space is plenty for just lightroom. (Unless you have a super massive library - then I don't know.)

What I meant was you could open activity monitor - and keep it running. Hopefully you can see it if you get a freeze - and maybe it will tell you something about memory or cpu usage.

Adobe has a whole page on stuff to try when using Adobe apps
Troubleshoot system errors, freezes | Mac OS 10.x | Adobe software

Every little bit of information you can gather before it crashes again will help debug the problem.

Thanks for the Adobe link. I wasn't aware of it. I shall try out its recommendations.