Hi there! I understand you're having trouble reaching mychartplus.com and that the server isn't responding. Let’s see what we can do to resolve this.

1. Check Your Internet Connection: Make sure your Mac is connected to the internet. You can try accessing a different website to confirm.

2. Clear Browser Cache: Sometimes, cached data can cause display issues. Here’s how you can clear the cache in your browser:
- Open Safari.
- In the menu bar, select "Safari" > "Preferences."
- Go to the "Privacy" tab and click on "Manage Website Data."
- Click "Remove All" to clear your cache.

3. Try Another Browser: If you're using Safari, try accessing mychartplus.com via another browser like Chrome or Firefox to see if the issue persists.

4. Flush DNS Cache: Flushing your DNS cache can also help. Here’s how:
- Open the Terminal (you can find it in Applications > Utilities).
- Type the following command and press Enter: sudo killall -HUP mDNSResponder
- Enter your password if prompted (you won’t see any characters while typing).

5. Check for Server Issues: It may also be worth checking if the MyChart Plus server is down. You can do so by visiting Downdetector to see if there are any reported outages.

6. Contact Support: If none of these steps work, it might be helpful to reach out to their technical support directly at 860.972.4993 as listed on their site here.

Could you try these steps and let me know if you're still experiencing the issue? I'm here to help!