I was recently applying for work after graduation. One entry level position and a small company (with a vague job posting) wanted me to complete a pretty extens

I was recently applying for work after graduation. One entry level position and a small company (with a vague job posting) wanted me to complete a pretty extensive problem which would involve access to their code base and take "5 to 10 hours." I also would need to use a Mac and Objective C, even though these were not on my resume or the job posting. (I work in a .NET shop and had mentioned using Xamarin for Android development, and they were mainly doing iOS and OS X work, but extending into being cross platform). I asked if they had a problem I could do that would be on more familiar tooling, noting that even if I could borrow an OS X machine, it would take me a while to get familiar enough to complete the task they sent me. I also expressed concern at the length. I ended up declining to participate and they moved on. (Note: I have never used OS X besides briefly using someone else's computer. Everything I have used has been Windows and Linux, with a couple of weekends of trying some BSD-based distros thrown in.