RARE 1985 Switcher Construction Kit original working software disk and original manual for Macintosh 512K on 400K disk, by Andy Hertzfeld, one of the designers of the original Macintosh computer! Allows user to switch between open applications on a Mac 512K, otherwise only one application could be running at a time. This is a very unique and very rare piece of early software for Mac. The full story about Switcher can be found at the folklore(dot)org website, just go there and search \"Switcher\" for a full article about this software written by Andy Hertzfeld himself.Photos are of actual disk and manual buyer will receive, no computer or anything else included, Mac only shown to demonstrate this software disk in operation. This is early Mac software on single-sided 400K disk for use on a Macintosh 512K or an original Macintosh 128K that has been upgraded to 512K RAM, will not work on a Mac 128K. Make sure it bed can used with your system prior to purchasing. Very collectible original Apple earlyMac software by one of the designers of the original Macintosh!From smoke-free climate-controlled environment. Very clean and nice crisp condition, some written notes in the manual by the original owner, tear to the disk holder in back and label added there also as shown. Disk is clean and nice with great original label, no writing, and is original first version A!
Disk tested and boots right up at time of listing on a properly maintained and fully functioning original Macintosh 512K computer. No returns on 37+ year old vintage software as it shown tested and working in the listing and of course cannot guarantee it will work on a buyer\'s specific hardware. Sold for collectible and display purposes. This is a highly collectible rare genuine Apple 1985 software set!
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