Identifying & Correcting Roundcube Rendering Issues on macOS Safari

Safari on macOS may occasionally display Roundcube incorrectly. Symptoms include missing icons, blank panes, unresponsive buttons, or the interface appearing partially loaded. These issues are almost always caused by Safari caching, content blockers, or Safari’s Intelligent Tracking Prevention (ITP) interfering with Roundcube’s scripts.

The sections below explain how to identify the issue and apply the correct fix.

Common Symptoms of Safari‑Related Roundcube Issues

• Blank message preview pane
• Missing icons or buttons
• “Loading…” spinner that never finishes
• Folders or messages that do not respond
• Layout appearing unstyled or partially loaded

Why Safari Causes These Problems

• Aggressive caching
• Content blockers interfering with scripts
• Intelligent Tracking Prevention (ITP) affecting session cookies
• Extensions blocking JavaScript or CSS

1. Confirm the Issue Is Browser‑Specific

1. Open Roundcube in another browser such as Chrome or Firefox.
2. If Roundcube loads normally in another browser, the issue is isolated to Safari.

2. Clear Safari’s Cached Website Data

1. Open Safari.
2. Select Safari > Settings.
3. Open the Privacy tab.
4. Select Manage Website Data.
5. Search for your webmail domain.
6. Remove the stored data for that domain.
7. Close Safari completely and reopen it.

3. Disable Content Blockers for the Webmail Site

1. Open Safari.
2. Navigate to your Roundcube webmail login page.
3. Select Safari > Settings for This Website.
4. Disable Enable Content Blockers.
5. Reload the page.

4. Adjust Safari Privacy Settings That Affect Roundcube

1. Open Safari.
2. Select Safari > Settings.
3. Open the Privacy tab.
4. Disable Prevent cross‑site tracking.
5. Ensure Block all cookies is not enabled.
6. Reload Roundcube.

5. Reset Safari’s Website‑Specific Permissions

1. Open Safari.
2. Navigate to your Roundcube webmail domain.
3. Select Safari > Settings for This Website.
4. Reset any modified permissions such as JavaScript, pop‑ups, or auto‑play.
5. Reload the page.

6. Test Roundcube in a Private Window

1. Open Safari.
2. Select File > New Private Window.
3. Log in to Roundcube.
4. If Roundcube works correctly in a Private Window, the issue is caused by cached data, cookies, or an extension.

7. Disable Safari Extensions Temporarily

1. Open Safari.
2. Select Safari > Settings.
3. Open the Extensions tab.
4. Disable all extensions.
5. Reload Roundcube.
6. Re‑enable extensions one at a time to identify the cause.

8. Update macOS and Safari

1. Open System Settings.
2. Select General > Software Update.
3. Install any available macOS or Safari updates.
4. Restart the Mac and test Roundcube again.

When to Contact Support

If Roundcube still renders incorrectly after completing all sections, contact support and include:

• A screenshot of the issue
• Your macOS version
• Your Safari version
• Which troubleshooting steps you completed