To add to
jon's grelber's comment and perhaps make the principal clearer: Since MacOS and Safari automatically recognizes a URL such as
https://www.finetunedmac.com and makes it clickable there is no need to use the UBB URL form unless you want to give the link a title such as
FineTunedMac The UBB format for that would be:
[url=http://www.finetunedmac.com]FineTunedMac[/url]