Apple is responsible for developing the Mac operating System.
Operating systems are developed by 3 major companies. Microsoft makes Windows, Macintosh makes macs, and Linux makes Linux operatin systems. There are a variety of versions of each OS.
Microsoft
Windows is developing windows 7
Apple Inc.
iOS is Apple's mobile operating system. There are many different operating systems such as Windows , Sprint, and many other miscellaneous companies.
apple
An OS that isn't made by companies. Linux is an example.
booth are different companies and operating system
Generally, anything written in java will transfer over to another operating system.
My opinion, I think they work on developing an operating system without making money from it to actually see what they're developing works. Or just to develop it for their own pleasure and not think about selling it.Perhaps the challenge and the learning curve involved is the reason why somebody would write an OS for no pay.
Unix is an multitasking, multi-user computer operating system developed by AT&T. It is currently owned by The Open Group. The Unix operating system was originally intended to be used for developing software.