Not only does it emulate the UI, it emulates the entire computer, including the power light and the disk drives. YouвЂ™re all probably wonder what the emulator is like.

This may sound strange, but when you thing about it, when you move a real file from one folder to another in real life, the file no longer exists in the folder from which it came.

I imagine this was because back in 1983 disk space was limited, and in some cases you didnвЂ™t have enough room on the disk to simply duplicate the file on the same disk.ДЄnother thing that is a little strange вЂ“ but not when you think about how things work in the real world вЂ“ when you drag a program from one disk to another, once the file is copied, Lisa deletes the program from the first disk. Before it duplicates the file, you have to drag the flashing icon where you want the copyВ before it duplicates it. It creates a flashing icon resembling the file you wish to duplicate. It works kind of like Sleep on a Mac, the only difference is that all of your documents are automatically saved.ДЄnother feature I like is when you tell Lisa to duplicate a file. The same thing happens when you hit the Power Button.Д®ven if you have 20 documents open and you hit the Power Button, Lisa will save all of them, set them aside, put everything away, and only then turn itself off.ДЄs soon as you turn Lisa back on, it reopens everything and puts it just like you had it before you turned it off. This would come in handy if someone (like your boss) gave you another disk and told you to check it out.ДЄnd as soon as you put the previousВ disk you were working onВ back in Lisa, it automatically reopens the document(s) you were working on вЂ“В just as you had them before you ejected the disk. Here is another thing I really like: If you have a document open on a disk and you try to eject that disk, Lisa will save the document(s), close them, and only then eject the disk. Other than the revert feature, thereвЂ™s absolutely no reason you would ever have to save a document itвЂ™s automatic. Say you started working on something last week, and the last time you saved it was two days ago.В Lisa keeps track of all of the changes you made since the last time you saved, so every time you set aside your document, it updates it without even asking.Д«ut say you screwed something up in your document? You can simply tell Lisa to revert to the previous version! In fact, the only reason you would ever want to save anything on Lisa is so you canВ revert to the previous version later on. If you do tell it to save something, it makes a reference file that you can revert to at a later time.

Another nice thing is that you never have to tell Lisa to save something.

Mac os x hidden os emulator