just be thankful it's only old dos games you want to run..
there are still a huge amount of early windows games (3.1 / 9x) that are practically impossible for your average guy to play these days, you need a full virtual machine with very specific 3d acceleration in many cases (which doesn't exist, or is very slow*) because the old exes don't run on anything above 9x due to improved security etc. in everything past that.
of course I doubt your precious mac is immune to this problem either... i'd guess there are a large chunk of older mac games that are an absolute ballache to get running on anything these days.
* emulating a full x86 PC with 3d acceleration running a complete Windows OS isn't exactly a lightweight task, even most commercial VMs are more tuned to business apps than games.