miriam.bp

I've been trying for the past hour to instal forge for Minecraft 1.7.10 on Mac and every time I open it, it won't load past 1/4 of the way. I downloaded forge 1.15.2 without any problem, but for some reason 1.7.10 just won't work. I've tried letting it load for 20+ mins and it hasn't moved at all and I can't find any info on how to fix it. I added a screen shot so you can see what I'm talking about. Any idea on how to fix it?