To get into Ruby on Rails web development, there are some tools and basic skills you will need.
The Mac, in my opinion, is the preferred platform of choice for Ruby on Rails developers. If you attend any Ruby conference you will see the majority of attendees use a Mac, probably around 90%. The others will be primarily Linux users. There may be some scattered Windows users, but the Windows platform is not an easy one to use as a Ruby developer.
The Mac operating system runs on top of Unix, which makes it an ideal system for Rails developers to use, since so much of the software we need is Unix based. It also provides a stable, rich UI platform for some very helpful applications. Installation has been made very simple compared to other platforms.