Repeating this from reddit, but whatever.

Well, I've been playing SP on my school Macbook Air for ages... But now that school has patched a thing in their security that allowed a renamed Steam application that is something other than steam to operate, Steam no longer works on my computer... At all. And if I attempt to redownload it, it stops it before it opens. So unless the devs puts out a standalone of 1.3 similar to Gumroad, I won't be able to use my macbook at all for SP. And that means there will be a lull in my plane building until I either get my dad's computer or I start building on my iPad... and I really hate to build on my iPad, especially by itself. Plus my progress on the CFA-44 is fairly lost except for the small amount of work I put into the build making the nose... So either way, most of my building will be delayed for the moment.