To reset the Launch Services database, you should use its -kill option. In Terminal will return its usage information. System/Library/Frameworks/amework/Versions/A/Frameworks/amework/Versions/A/Support/lsregister -h The tool which maintains the Launch Services database is lsregister, which is conveniently tucked away in /System/Library/Frameworks/amework/Versions/A/Frameworks/amework/Versions/A/Support. Even if someone were to tell you where to find the files, you cannot just trash them. Restarting in Safe mode (with the Shift key held) flushes quite a few caches, but does not touch the Launch Services database. There is no simple way to rebuild your Launch Services database, unless you have a utility such as OnyX which includes this as a feature. If it appears more general, affecting other types of document, or the app associated with a document type keeps changing, or changes back to the wrong app, then your Launch Services database may be frazzled and needs to be rebuilt. Before doing so, check that the Kind shown at the very top is correct – the document might have a misleading filename extension which has confused Launch Services. There you can change the app used to open that document, and then click on the Change All… button to apply that to all other documents of that type. Then one day, you try opening a text document directly – for which Launch Services determines the app to use – and the wrong app starts up.Īs an isolated occurrence, the solution is simple: select that document in the Finder, and open its Get Info dialog (in the File menu, or Command-I shortcut). You might have changed that, so that they will open in your favourite text editor. text, and their variations, are set to be opened by TextEdit. By default, text documents with the extensions. The most common problem which occurs with Launch Services is that they misassociate a document type with an app. macOS now hides the database, and the only way of modifying it is through the undocumented command tool lsregister, which is not even stored in one of the usual locations for command tools.
#ONYX FOR MAC 10.13 MAC OS#
In early versions of Mac OS X, the database was kept in two files, ~/Library/Preferences/LSApplications and LSClaimedTypes, but those days are also long since gone. Way back in classic MacOS, the Finder’s desktop databases maintained that information, and it was not uncommon to have to rebuild them periodically to resynchronise document and app icons. Requires a database which tracks apps and their capabilities, and document and URL types and how they should be represented. providing ancillary information about files and URLs, such as an associated icon,.maintaining lists of document and URL types which an app can open,.identifying the default app with which to open a document or URL,.opening documents or URLs in other apps,.In yesterday’s article, I listed the main tasks of Launch Services, and explored how it appears to perform just one of them.
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