VirtualBox on Mac

apache.conf

<VirtualHost *:80>
#...
        DocumentRoot /var/www/yoursite
        Options FollowSymLinks

        <Directory />
                Options FollowSymLinks
                AllowOverride FileInfo
        </Directory>
        <Directory /var/www/yoursite>
                Options Indexes FollowSymLinks MultiViews
                AllowOverride FileInfo Indexes
                Order allow,deny
                allow from all
        </Directory>
#...
</VirtualHost>

guest_hosts

127.0.0.1       localhost yoursite.dev yourothersite.dev

host_hosts

192.168.56.101  ubuntu yoursite.dev yourothersite.dev

mount.sh

$ sudo mkdir /mnt/host-home
$ mount -t vboxsf -o uid=33,gid=33 host-home /mnt/host-home

symlink.sh

$ cd /var/www
$ ln -s /mnt/host-home/work/yoursite