Doesn't support MacOS 10.9+ due to Adobe Flash being discontinued, but there is a workaround!
1. Go to Finder and find Wedding Dash: Ready Aim Love in your Applications section or in a folder for MacGameStore. Inside the game's folder is another folder with the Mac game itself; right click it and choose 'show package contents.'
2. The folder you're looking for is hidden for security reasons. First click on the Contents folder then resources and enter on the keyboard at the same time Command+Shift+. (the period key.) You'll see a lone new folder called 'Game.'
3. You'll find the base game which has all the info for the game to run. Like last time, right click. 'show package contents,' and go into contents. Now go to resources and then assets.
4. Unlike some of the other Diner Dash games, which has the same issue, Wedding Dash has all of Flash required 'comics' for new areas in one folder simply called 'Comics' with the outdated .swf files inside. You can either outright delete the folder or the .swf files themselves.
5. The only issue you'll have now is during the loadup with the same 'missing plugin' - I'm sure there's another file you can delete to outright skip it, but you can just click anywhere to skip it (it's probably just the game company logo.)