I am searching for the Apple Developer Connection Core Reference Library for Leopard docset for a PowerPC supported project. Unlike Xcode 2.5 on Tiger, the docs which shipped with Xcode 3.1.4 on Leopard were only a partial skeleton and were designed to be "fleshed out" by pulling them down via RSS from Apple's servers, but these .atom feeds are no longer valid. Scouring the net, I was able to locate the Snow Leopard Core Reference docset and also a hugely comprehensive Legacy Reference tome (with dev articles dating back to System 7 circa 1994), but Apple appear to have expunged all traces of the Leopard PowerPC developer docs. The Snow Leopard docs are still somewhat usable, but not integrated into Xcode as the expected version would be. Drilling into the Xcode 3.1.4 (Leopard) partial docs info reveals that Leopard's Core Ref Docset was linked to the feed at: https://developer.apple.com/rss/adcdocsets.atom Using the Wayback Machine, I was able to locate an old link which had the docset in .xar format at: http://developer.apple.com/docsets/May2009/com.apple.ADC_Reference_Library.CoreReference.xar (length: 290685981 bytes) This is the file I'm looking for. But alas, this old link is a dead end. Just wondering if anyone did a personal backup of these docs before Apple pulled them? If you had hit the "Subscribe" button in Xcode back when the feed was available (around 2011?) then your docs should be at: /Developer/Documentation/DocSets/com.apple.ADC_Reference_Library.CoreReference.docset The installed partial (incomplete) docset is 421.7MB, so if your file is closer to a gigabyte then it should be the complete set. Thanks in advance. -AphoticD (Note: I have also posted this on the PowerPC Macs forum. My apologies for the duplicate).