Your Mac encountered a problem?

Hi guys,

Yesterday, on my way home on the train, I had my Mac on and working with the following things running:

USB modem connected to the internet
WD external HDD with music playing from it in VLC (headphones attached too)
Microsoft Word and One Note running through Parallels 9

Twice during the journey, the music started stuttering, then the Mac screen went white with the display stating something like "your Mac encountered a problem bla bla.. wait a few seconds or press any key to restart".

The first time I had sent the report thingy to Apple but wasn't clever enough to copy the whole error log.. Does anyone have a clue what might have caused this problem?

The Mac I have is a 2013 MBA, 13'', 256 GB, i5 and 8 GB RAM.


Any insight will be greatly appreciated

 

Not quite sure how to do that..

TimeMachine was also running at the time. The stuff on the hard drive is mainly music that I have backups of elsewhere, and other files. None were harmed and nothing was corrupted after I rebooted. Just really, really weird as it's a powerful Mac and I see no reason why it would have happened.. Unless maybe the USB Modem was the cause of the problem..


On another note -

When I double click a OneNote or Word file in my DropBox folder, it does the animation as if it's about to open, but it doesn't. I need to copy the files to the desktop before I can open them. Any idea why this might be?
Also, I can't scroll using 2-finger scroll in OneNote. It works in Word though..

Any thoughts?


Thanks