![]() ![]() ![]() SDMHelpData, a folder containing hierarchies of stub Help books.ist, a keyed archive apparently indexing into the contents of fsCachedData,.Generated, a folder containing many stub Help books each of which contains a help index,.fsCachedData, a folder containing many files named using UUIDs,.Cache.db and two supporting database files,.In Sierra, the key folder ~/Library/Caches/ contains: System/Library/CoreServices/HelpViewer.app is now at version 6.0, up from 5.3.5 in 10.12.6, and /System/Library/PrivateFrameworks/amework/Versions/A/Resources/helpd is at version 1.2.3, from 1.1.10 in Sierra. ![]() But the way that this works, and how HelpViewer accesses those data, appears to have undergone radical overhaul. If you want to refresh your mind as to how Help works in Sierra, this article may be helpful.Īs far as I can tell, the top-level architecture of the Help system has changed relatively little: helpd is still there, processing Help books and turning them into the private databases stored in ~/Library/Caches/. This article presents a brief account of how Help works in High Sierra 10.13.4 and later. On investigation, I discovered that the undocumented support files on which HelpHelp relies had changed format and content completely. This only came to my attention because my Help book utility HelpHelp now crashes when opened in 10.13.4. However, users and developers should be aware that, when using Help in 10.13.4 and later, they are dealing with quite a different beast from that in the first release of macOS 10.13, Sierra, and before. I have checked through Apple’s release notes, including those concerning the SDK changes for developers, and have been unable to find any reference to such changes. At some stage, between the release of macOS High Sierra 10.13 and the latest update to 10.13.4, Apple has replaced its Help system. ![]()
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