Thanks for posting in the Lucidchart Community! External links or links to email will remain active and should be clickable when exporting your document to PDF, no matter if the file is open in a MAC or PC. If the those links types are not working, I’d recommend following these troubleshooting steps to make sure that everything is in order on that front. I'd also recommend taking a look at the Actions (Links) and Hotspots article from the Lucidchart Help Center for going over the details on how to include links in your documents. If the issue persists, this is likely a document specific issue, so please send the specific information and screenshots of your trouble to email@example.com. Hope this helps!