I'm putting together an Xcode 4 plugin and I'm wondering which OS X version I should make be the minimum required. I was hoping to have it be Snow Leopard (same as Xcode 4), but I'm finding some of the tasks I want to do (like parsing code using NSRegularExpressions) require Lion... I'm wondering whether it's worth my effort to find a way around this or not. So, what version of OS X are you using Xcode 4 with? If no one is using Xcode 4 under Snow Leopard, there's no reason for me to have my plugin support it. Edit: There's a poll on this topic if you're viewing this on the full website... The mobile version of the forums seems to omit that.