Two weeks on Squarespace

It is two weeks now since I have moved my Blog to Squarespace an I have to say I am quite impressed. Speed is good, the CMS is awesome and support has been fast and helpful with some issues regarding my custom domain settings at the beginning.
That said I am pleased that I can use Windows Live Writer on my Windows machine - even though it is awkward that I can't set tags and categories from Live Writer. On my iPhone (which I am using right now) and on the iPad the Squarespace App works great. My only issue is to find a good blogging App for my Mac. Any tips?