virtualbox.org

I Googled and searched this forum but couldn't find a workable solution.

How do I get my guest Windows 7 ultimate (I have installed Guest Additions) to adjust the resolution to the Retina resolution of my MBP 15" late 2013? The max in full screen mode is: 1440 x 900.

Thanks in advance!

Moved to Mac as host.

VirtualBox doesn't support Retina displays. Here are some possible workarounds. Retina Info