@grantal77 - Somehow I missed your post, so apologies for the time it has taken for me to get back to you. I don't know much about Macs, so you will have to forgive me if I mention something that doesn't make sense for you.
Your screen shot looks like something is blocking SimCity from fully launching or reaching the Internet. For PCs, I would recommend that you make sure to set the program to run "as administrator". My Google-fu is failing me, I don't see any way that you can do that with a Mac. If you're aware of a way, that may help.
Other easy things to check - make sure Origin.exe and SimCity.exe are both added to exception lists for your firewall, antivirus, and anti-malware programs. Make sure your OS and graphics card are updated to newest version. Try uninstalling/reinstalling SimCity.
Sometimes SimCity will fail to copy update/install files - find the SimCityUserData folder, inside you should find Patches folder, inside that is UpdatedApp folder (on a PC the default location is Program Files (x86)\Origin Games\SimCity\SimCityUserData\Patches\UpdatedApp). Select all files in UpdatedApp folder and copy; then paste to main SimCity folder (default location for PC is \Program Files (x86)\Origin Games\SimCity). You can also try to repair the game through Origin - In Origin, right-click the SimCity icon and choose "Repair Game".
Monitor Settings - SimCity does not work with dual monitors, so set it to use one only. Also, no higher than 1080p resolution (no 4k)
If none of these work, the problem may be trying to connect to the servers. Here are some Mac connection troubleshooting tips to try: https://help.ea.com/en-us/help/mac/connection-troubleshooting-advanced-mac/
Please reply back to let us know if any of these worked. If they did not, please include your computer specs and any error messages you may have received. We need to get you building!
