SimCity 4

Insufficient updates for developer products can cause SimCity 4 to crash. Be sure to regularly install the latest software updates.

Restarting your computer can resolve numerous common problems, so it should be the initial step before changing any software-related settings.

Setting a default program by file type in Windows

1. Take the first step by right-clicking on your file. Next, select "Open With" and then choose "Choose another app" from the available options;
2. In the pop-up window, find and select the SimCity 4 application from the available options;
3. Make sure the "Always use this app" checkbox is checked and click "OK" to confirm your choice as the default app for opening files.

Change the default app for a file type in Mac

1. Right-click or Control + left-click on the desired file to open a menu of available actions;
2. Select "Open in application" and click "Other";
3. At the bottom of the window, you will see the "Enable" menu. It is already set to the default option, "Recommended Programs";
4. In this menu, select "All Programs" and search for SimCity 4. Check the box next to "Always open in app" to make it the default option.