OS X 10.4.10 Now Includes Yahoo!Sync Installation

An insightful tip from TUAW reader Dustin Johnston has unveiled that the recent OS X 10.4.10 update includes a new framework, specifically Yahoo Sync. This component is situated within the directory at /System/Library/PrivateFrameworks, and is named YahooSync.framework.

It encompasses an integrated application known as Yahoo!Sync.

To locate this framework on your Mac, navigate through Finder by selecting Go -> Go To Folder and input:


A closer examination of the application and its associated framework strings indicates that synchronization functionalities will utilize a Yahoo! ID, which should be stored in the Address Book. Clearly, an active Yahoo! account is necessary to enable synchronization.

Although the precise functionalities of this application remain somewhat ambiguous, it is probable that it facilitates the synchronization of your Yahoo! calendar with iCal.


Brian is a dedicated writer for TUAW, where he shares his insights and expertise on all things Apple. With a deep love for technology, Brian covers a wide range of topics, from the latest iPhone and iPad releases to the intricacies of macOS and Apple Watch features. His clear and engaging writing style makes complex tech topics accessible to all readers. Brian’s enthusiasm for Apple products shines through in every article he writes.