The demon from Purebasic.com gets bugs

[ynkrc]

I have just downLoad a demon from Purebasic.com
I open it and coding "MessageRequester("","")" and try it,but get a wrong message
_________________
assembler error
sh:nasm:command not found
____________________
my poor english
what's wrong with it?

[Fred]

Hello,

You need to install XCode from the apple.com site.

[ynkrc]

Hello,

You need to install XCode from the apple.com site.

thx for help.