Posting photos

OK, I'm getting the hang of site creation but I knew it was going to be trickier than I thought. Especially with Mercury in retrograde. I've just tried to add a photograph but immediately ran into problems. It seems Blogger uses an ancillary program known as "Hello" to host photos. I've just tried to download it but it only comes in PC format. So my first political comment is to ask why Windows still seems to rule the world (just joking, I know the answer; please don't deluge me with the pros and cons of differnt operating systems etc). So can anyone advise me on how to get around this problem when using a Mac?