When you export to disk, the dialog allows you to see and select any location you want…
There is. But I prefer to upload via the website
Flickr Uploadr
P.S.
No idea, why the link of the website is translated to french
Look at the post of Joanna. I do the same. No preset in fact to share.
I have that on my Mac mini but I’ve not yet got it on the Macbook… thank you 
You have PL on your Mac. I suppose you also have internet on that Mac.
Go to Flickr, login and go to the download page. From there you can select any file on your Mac.
George
Ah! Thank you for sharing that