So I wrote my deferred exam on June 22nd and my mark is still and F when I check my grades on Mosaic.

Now the exam is worth the majority of my grade and it's perfectly possible that I could have failed and the mark technically did update but is still an F. But I can't find a way to tell.

I do notice that at the bottom of the 'Grade' page it says: Academic Standing... Pending Grades

But I find it hard to believe that they've taken this long to mark my exam and update everything.

A friend of mine wrote a deferred exam and he still didn't get his mark yet. You can email your prof and ask if you passed the course. Or if you're around Hamilton you can drop by their office and ask in person.