I know you discussed how to post using a mac running 10.0+ There is no right click, I thought you pushed the ctrl key and clicked the picture. A set of choices comes up and one is copy link. I click the image button and paste the url but the original file when uploaded to smugmug had .jpg extension but after uploading the url does not end in .jpg.
See the red X's at Jorge's last Freedom Ride
Ride like Hell is chasing you.