VB sleeps on OS X Yosemite after multi tasking

[luditus]

I am running VB 4.3.28 on OS X 10.10.3 with Ubuntu server installed as guest system.

The system works, exept that it "sleeps" after I start multi tasking. I have to "touch" the vb window in order to continue work on e.b. terminal via SSH.

The box has 2 network cards. One is bridged adapter on en0 (wifi), the other vboxnet0 host only. The later one is the one I am accessing the server.

It seems that OS X is putting the "inactive" window to sleep after I start working on another programm for a minute. After "touching" the vb window, the server get accessible again.

Thank you for any help on this, cant find any help via search on this issue.

[loukingjr]

right click on the VirtualBox application icon>Get Info>enable Prevent App Nap.

[luditus]

this seems to have fixed the issue! Thank you.

[loukingjr]

welcome.