Hi there! I understand your El Dorado Savings Bank online banking isn't loading on your Mac with OS X 10.15.7. Let's work together to get this sorted out.

To start, can you tell me if you're trying to access the online banking via a web browser or through the mobile app on your Mac? Also, which browser are you using? Any error messages or behaviors you notice when trying to load the site will help me pinpoint the issue.

In the meantime, here are some basic steps we can try for browser-related issues:

1. Clear your browser cache and cookies—sometimes stored data can interfere with website loading.
2. Try accessing the online banking site using a different web browser like Safari, Chrome, or Firefox to see if the issue persists.
3. Make sure your browser is up to date.
4. Disable any browser extensions or ad blockers temporarily as they may block parts of the banking site.

If you are trying the mobile app on your Mac, note that the MyEDSB app is optimized primarily for iOS and Android mobile devices. You may have better success accessing the online banking via the web browser on your Mac instead.

Once you let me know what you've tried or your exact setup, I can guide you through more targeted steps or check account-related or server issues on our end. Looking forward to your reply!