Hi there! I see you’re having trouble passing the Cloudflare verification when trying to access the Air Serbia site or app on your Mac with OS X 10.12. That’s definitely something we can work through together.

To get started, could you tell me if this issue happens in all browsers on your Mac (like Safari, Chrome, or Firefox), or just in one? Also, do you see any error messages or does the verification just keep spinning or looping indefinitely?

Meanwhile, here’s a step-by-step approach to resolve this Cloudflare verification issue:

1. Clear Browser Cache and Cookies
- Open your browser’s settings/preferences.
- Find the option to clear browsing data. Make sure to clear cache and cookies.
- Restart the browser and try accessing the Air Serbia site again.

2. Disable Browser Extensions
- Sometimes privacy or security-related extensions can interfere with Cloudflare checks.
- Temporarily disable all browser extensions, especially ad blockers or VPN-related ones.
- Try loading the site once more.

3. Try Incognito/Private Mode
- Open a new private or incognito window (e.g., Safari > File > New Private Window).
- Access the site from there to see if the verification passes.

4. Check Your Network and VPN Settings
- If you’re using a VPN, try turning it off since it can trigger Cloudflare verification problems.
- Also, avoid public or shared Wi-Fi networks for testing, as Cloudflare might flag those.

5. Reset Your DNS Cache on macOS Sierra (10.12)
- Open Terminal (find it in Applications > Utilities).
- Type: sudo killall -HUP mDNSResponder
- Enter your admin password when prompted and hit Enter.
- This clears the DNS cache, which sometimes helps resolve website access issues.

6. Update Your Browser
- Make sure your browser is updated to the latest version supported on your OS X 10.12 system. Older versions may not function properly with modern web security checks.

If after these steps you’re still unable to pass Cloudflare verification on the Air Serbia site, please let me know exactly what behavior you’re seeing—like if it’s stuck on “Verifying you are human” or looping endlessly. Also, confirm which browser you tested.

That way, I can provide further guidance or escalate it if needed. Looking forward to your reply! Are you satisfied with trying these steps so far?