[sambe]

You normally do not have to disable security features to run programming/debugging tools, contrary to most of the advice you'll see in forums (and sometimes even Stack Exchange). I haven't used dtrace but non-bundled debuggers were a bit of a pain. You can self-sign these using the procedure described by a quick Google.

[jpitz]

Normally, no, but if you want to dtruss uptime, or any other bog standard system utility, then, yes you do.