@Christian Berger - Re: I don't get it
Are you sure you used OS X? Did you ever open a terminal or X session, in the shell type "rsync" without options or "man rsync" and find the "-e" option? Or set the default configuration?
I've worked on almost every flavour of UNIX and many Linuxes and BSDs over the last thirty years (Lord, is it really that long?) and I assure you, OSX is a decent BSD at shell level and truer to UNIX than many Linux variants.
rsync is not part of the OS, it is a utility programme. Most of the OSX shell utilities are GNU (just like Linux) or BSD. If you want a newer or older version and want to play techie, just go to mac ports (cf. BSD ports) or one of the many free software sites to download binary or source.
A big difference from some Linuxes is that OS X uses LDAP for most user system configuration.
You know, whatever one thinks of Google and many visual software shops, there must be a good reason why they favour OS X for their engineering and development.
Contrary to the FUD, while all hardware is liable to failure at some point, Apple hardware seems, in my personal experience and that of others I know, to be rather good and the design is well above average. Design is important as I have to look at the kit and use it, for years, in private and in public.
Perhaps I am just lucky. I've got a 12 year old Thinkpad that still runs, having had just a couple of very minor bits of surgery, albeit like treacle and even older scanner and printer. My macbook is a mere seven years old - still runs like sh- off a shovel.