Apple Corporation used and expanded the Graphical User Interface (GUI), which had been developed by Xerox at its Palo Alto Research Center. The GUI was not stolen but the desktop was a metaphor that has been used by Microsoft as well as Apple. The credit however goes to Xerox.
Whether Apple stole the GUI and related metaphors from Xerox Corporation or merely used ideas they were shown is a matter of interpretation, and perhaps a matter for a court decision. See the Wikipedia article on the suit between Microsoft and Apple on this matter, in which Xerox tried, unsuccessfully, to participate.
No loser (: Apple doesn't steal you'r money !
Xerox, which had done very rudimentary product testing on their machines. Interestingly, when Apple used the concept, it gained clear acceptance, unlike Xerox.
Xerox PARC
the GUI and the mouse came at the same time, in the Xerox Alto, then the Xerox Star, then the Apple Lisa, then the Macintosh.
No. Xerox was. Their Alto computer inspired Apple and other companies.
Steve Jobs and some of the Macintosh development team visited the Xerox Palo Alto Research Center where a system using a mouse and a graphical user interface was being developed. While the Apple team picked up some ideas there, the differences between the two systems are substantial. Some of the Xerox developers went to work for Apple and went on to develop their own system with features not included in the Xerox system.
In 1979 Steve Jobs visited the Xerox company who were using a mouse on their computer system but the mouse had been invented many years before that by Douglas Engelbart. The way the Apple mouse worked/was used differed from its use on the Xerox system and so it is debatable just how much influence Xerox had on the development of the Apple systems.
Nobody gave their graphical OS and mouse to Apple. Apple developed their own graphical OS for their Lisa computer and another graphical OS for their Macintosh computer. Steve Jobs and some of the Apple team did visit Xerox PARC (Palo Alto Research Center) where they saw the Xerox system which used a graphical interface and a mouse but they built their own system for the Apple computers which developed new ideas and expanded some features they had seen at Xerox.
The computer mouse has been around since the early 1960s. Apple was already working on the Lisa and Macintosh projects when Jobs and several Apple employees visited Xerox in December 1979 to see the Xerox Alto system. This used a graphical user interface and a mouse but differed considerably from the Lisa and Macintosh systems. Some employees left Xerox to work with Apple on their system.
The computer mouse has been around since the early 1960s. Apple was already working on the Lisa and Macintosh projects when Jobs and several Apple employees visited Xerox in December 1979 to see the Xerox Alto system. This used a graphical user interface and a mouse but differed considerably from the Lisa and Macintosh systems. Some employees left Xerox to work with Apple on their system.
The senior managment of Xerox Corporation did not recognize the value of what they had, and management at their Palo Alto Research Center knew that Xerox did not know how to develop it, even if they recognized its value. So they let Steven Jobs see it.
The Xerox Alto was an experimental form of what would now be called a "networked desktop computer." It was developed in the Xerox Palo Alto Research Center before the IMB PC or Apple I hit the market. Xerox deployed the Alto in many of its manufacturing and research locations, as well as within Ginn and Company, a book publisher that was then a Xerox subsidiary. However, the Alto was never offered in the commercial market. The Xerox 6085 (Xerox Star), using using a graphical user interface and operating system ultimately called GlobalView, was derived from the Alto and was eventually offered in the commercial market. It was unable to compete with the less costly PC and Apple Macintosh and was eventually discontinued.