Unverified60% confidenceFactExact time
macOS file-opening behavior is built on the Launch Services framework, where applications declare the file types they can handle (defined by UTIs) via Info.plist at installation time.
2
Sources
60%
Confidence
Long-term
Relevance
8/17/2026
First Seen
Sources
FileRouter：自定义Mac文件默认打开方式的效率神器
Related Claims
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