The long URL given above leads to a 1x1 pixel gif, which shows as a blank because it's transparent. I've seen this elsewhere and I don't know why it happens, but it's not any sort of an error in OSX, it's what's on the server.
and with Googleleadservices in the beginning of the URL addresses that Google itself came up with
In your posts you keep saying googleleadservices: googleleadservices.com is registered to someone in Bellevue who has taken steps to remain anonymous. However the URL you quote is at googleadservices; googleadservices is registered to Google and presumably this is what you mean. The URLs are to do with adverts placed on Google pages and I'm not sure whether they are intended for direct access. Do these URLs appear in clickable links?