Linked by Thom Holwerda on Thu 11th May 2006 15:48 UTC, submitted by Eugenia
"Aside from an awesome user interface and a great underlying architecture, Apple built OS X with security in mind. As part of that central security theme, OS X has been designed using three key isolation features: system isolation, user isolation, and memory and application isolation."
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Member since:
2006-04-20
> if Stevie was such a visionary why didn't he put these features in the
> original Mac OS (along with a preemptive task scheduler and IPC and
> virtual memory) - the Mac team started with a clean slate, had no
> requirement for compatibility with anything, and look what they
> came up with in the 1980s.
But they had a big constrain: 128Kb of Ram and 400K floppy for BOTH System and applications!
The first Mac had to be a very cheap computer (under 1000$ believed their developers, even if then Apple was greedy and charged much more for it).
Lisa was developed in the same timeframe, or a bit earlier, and had preemptive multitasking and virtual memory (and an hard disk).
Unix workstations and mini computers of that time costed much much more.