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Apple fix for Mac OS X 10.4.9 file sharing troubles

Apple has published a fix for File Sharing connectivity issues from Mac OS 9 machines introduced by the 10.4.9 update.

CNET staff

One of the consequences of the update to Mac OS X 10.4.9 has been that users who connect between a Mac OS 9 (or earlier) computer and a 10.4.9 computer, using Apple File Sharing, have been unable to copy files between the two computers. The problem could be solved, as we reported, by restoring the earlier version of AppleFileServer.app, but of course there is some risk involved when you mix-and-match files from different versions of the system.

Now Apple have published a solution; in the Terminal on your 10.4.9 machine, enter this command on a single line, and hit Return:

sudo defaults write /Library/Preferences/com.apple.AppleFileServer TCPQuantum -int 327680

According to a well-written Infinite Loop article:

Adjusting the TCPQuantum parameter for the AFP server will apparently prevent the timeouts and disconnects between the two operating systems. TCPQuantum in AFP-speak represents a maximum size for a block of data being transferred to or from an AFP server; increasing the amount lowers the number of requests the server has to make for data at the expense of a gradual increase in overhead.

Apple's note is written as if it applied only to 10.4.9 Mac OS X Server; but the defaults write approach appears to work equally well for ordinary Mac OS X machines. One Infinite Loop reader comments that this fix even restored his ability to connect from a Mac OS 8.6 machine to a Tiger machine.

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