i belive there is a option that will stretch the display to fit the screen in
virutalbox
but i dont know if you can increase the resoulution
you must relise that using non-libre software
software to run a virutal machine with trisquel dose not
increase your privacy and definitly dosent increase controll
you have over your computer
the files that are used to store the virutal machine data
are still controlled by the host operating system osx and apple and a
goverment could acsess them if they wanted too
using a vm to run trisquel dosent improve the bad operating system your
running
it is possible though to run trisquel as the main os on macs
here is a post about it:
https://trisquel.info/en/forum/installing-trisquel-mac
but my advice would be to sell your mac and buy a libre friendly computer you
can get good ones here:
http://libre.thinkpenguin.com
but if your mac has gone down in value and you need somthing cheaper the good
news is libre software tends to work well with old computers and if anything
dosent work like wifi etc then you can get a usb libre wifi card form here:
http://libre.thinkpenguin.com
i recently got a good pentium4 machine for £24
btw i dont work for think penguin there are many other libre hardware
distributors:
https://www.fsf.org/resources/hw/endorsement/respects-your-freedom
also you can find hardware reported to work with libre software here:
https://www.h-node.org/
