On Thursday, September 19, 2002, at 12:29 PM, Bernie Zenis wrote: BTW, so, do we currently have a kernel that can emulate older versions? And drivers, etc.? No, although an "old" kernel can often support newer user-level bits than it was designed to run with. Just think about update installs. While running on an existing kernel, we replace all the user-level bits with new version. Every app launch after that point runs with the new /System bits. The kernel (and the user-level daemons) must deal with some applications running with new bits and others running with old bits. At some point even that breaks down. That's when we require a CD install (we can't cope with the mix of old and new user-level bits between the two versions). This may be an issue with the kernel, or an issue with user-level daemons or peer-to-peer frameworks. But its a pretty sure bet that its going to be an issue with something if you try to mix across these versions. Rarely does a kernel need to run with older /System bits (and by this I also mean /usr, /etc, /bin, etc... bits as well), so we rarely design that in. --Jim _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.