# Additional step for Safari users

Source: [https://docs.virtosoftware.com/docs/calendar-overlay-pro/administrators-guide-to-installation-and-configuration/step-by-step-installation-instructions/additional-step-for-mac-users/](https://docs.virtosoftware.com/docs/calendar-overlay-pro/administrators-guide-to-installation-and-configuration/step-by-step-installation-instructions/additional-step-for-mac-users/)


## Safari Configuration for Virto Calendar

To ensure proper functionality of Virto Calendar in Safari, **cross-site tracking must be allowed** by disabling Safari’s "Prevent Cross-Site Tracking" feature. This adjustment enables cookies to function across domains, which is critical for data synchronization and core features.

## Steps to Allow Cross-Site Tracking:

1. **Open Safari** on your Mac.
2. Navigate to **Safari > Settings** (or Preferences).
3. Select the **Privacy** tab.
4. **Uncheck** the box labeled **“Prevent cross-site tracking”** (disabling this feature allows cross-site tracking).

![Safari Privacy tab with the Prevent cross-site tracking checkbox to disable](https://img-docs.virtosoftware.com/wp-content/uploads/2025/04/Screenshot-2025-04-10-at-00.04.22-1024x161.png)

**Why this matters:**  
When "Prevent Cross-Site Tracking" is enabled (checked), Safari blocks cookies between domains, which disrupts Virto Calendar functionality. Disabling it resolves this issue while still maintaining other privacy protections like fingerprinting prevention.