This error comes up on some systems when some MacOS updates are missing. This will cause an installer for the Visual C++ redistributable (an essential requirement to play) to fail and cause the problem.
- Please check for updates on your computer as described here: https://support.apple.com/en-gb/HT201541
- After this has completed, simply re-run the installers found in the following folder:
~/Library/Application Support/Steam/SteamApps/common/\Planet Coaster\_CommonRedist\vcredist\2015
If this does not resolve this problem in your case, please use the button below to create a ticket and let us know.
As with all technical issues, a System information report will be very helpful in understanding the situation. You can use this guide as a reference on how to obtain a System Information report from your Mac: https://support.apple.com/en-gb/HT203001