Mac – Is it Possible to Increase Display Resolution for OS X Maverick

Install the Hyper-V Integration Services. This provides better display/input/network integration between the guest and host.

A straightforward way of achieving that would be to change the specific configuration in the grub2 bootloader directly:

1. Find out the resolutions supported by your debian guest

   • Reboot debian and keep pressing c until you see the grub console.
   • Press vbeinfo and hit enter. It will give you a list of supported resolutions.

2. Edit /etc/grub.d/00_header

   • Replace autoin the line if [ "x${GRUB_GFXMODE}" = "x" ] ; then GRUB_GFXMODE=auto ; fi with the new resolution. e.g.: if [ "x${GRUB_GFXMODE}" = "x" ] ; then GRUB_GFXMODE=1920x1080 ; fi
   • Right underneath, make a copy of the line edited and replace MODE with PAYLOAD. e.g.: if [ "x${GRUB_GFXPAYLOAD}" = "x" ] ; then GRUB_GFXPAYLOAD=1920x1080 ; fi
   • Further below, you'll find the following line: set gfxmode=${GRUB_GFXMODE}. Add the following line below it: set gfxpayload=${GRUB_GFXPAYLOAD}
3. Reload grub2 configurations by running the command update-grub2 and rebooting afterwards reboot

[Note]
I've seen many examples in which the default line #GRUB_GFXMODE=640x480 in the file /etc/defaul/grub in uncommented. It was proven to be unnecessary for me but in case you need it, remember to update-grub2 after you've uncommented it.