Mac OS 8.5.1 offers improvements to Drive Setup, fixes a memory leak in AppleScript and an extended format corruption issue, reenables the use of many third-party ADB devices, and provides some improved Internet proxy firewalls for Sherlock. In addition, new Sherlock plug-ins are included.
Installing this downloaded OS. is highly prohibited!! I installed it and it broke my computer. When rebooting, it gave me a blinking ? icon sign and now it cannot find the starting system disk!! It totally wrecked my computer and now I have to pay couple 100 bucks looking for a Mac technician to come and fix it.