So I'm new to GOG and bought a couple old school games. I'm running Mac OS X and 3 of the games are Windows based. What can I do to fix the compatibility issue without partitioning my hard drive?

Hello MystikMemory and welcome to GOG.

What are those three games you are talking about?

Thinking twice next time before impulse-buying anything?

Alternatively, wine can help.

@Grargar - Ultimate Doom, Outlaws and Blood 2.

@Muntdefems - I was directed to purchase games on GOG by my brother who is a veteran computer programmer and also gamer like myself. I typically don't get involved with game emulators and such, I leave that all to him. Since he and I live so far away, I've had to poke my finger at giving this stuff a shot. I was led to believe I could purchase these games and play them on GOG and later on when I DL a game engine other than using GOG the games are still mine and not tied to GOG. I'm not as green as you may think.

Welcome, Mystik.

First of all, please note that the game card (site page) for each of those games indicates they are for Windows only.

Grargar has provided the necessary workarounds. You could also use Parallels, of course.

Myself, I do everything on a Mac + game on my Mac when possible, and have some offline windows computers for my Windows-only GOG games.

There are a bunch of games compatible with Mac here on GOG just directly from the download. You can sort by system on the "Games" tab, such as here. Do make sure you check system requirements. I have stayed on 10.7 and there are some newer games that require a higher version of the OS. A few games also are not compatible with 10.11.

Enjoy! :)

I know we have a couple GOGmixes for games that run on Linux but are not officially supported on this platform by GOG. Don’t we have something similar for games running on Mac OS despite being sold as Windows-only games?

Rampancy used to maintain such a GOGmix, but it seems to be missing newer stuff.

Games that can be run on OS X despite not having official support are most likely the same games that can be run on Linux despite not having official support.

Many games that can be downloaded for Linux and/or OS X on GOG are really Windows or DOS versions which GOG have bashed around a bit to make them work - with Wine or DOSBox most likely (Crossover, WineBottler, and PlayOnMac/PlayOnLinux are all really Wine in fancier clothing, and Boxer has a similar relationship to DOSBox), which are the same ways we ourselves would use for games that are sold as Windows-only (of the listed applications, Crossover costs money but has a time-limited trial, the others are completely free). Thing is, GOG requires the publisher's agreement in order to "modify" and sell the game for OS X and/or Linux, but we as customers don't because we're doing it for our personal use.