Files with apdetected file extension might be found as some kind of indexing files from Apple iPhoto (Apple Photo) application for Mac OS X / macOS.
Software that open apdetected file
APDETECTED file extension - Apple iPhoto data
What is apdetected file? How to open apdetected files?
File type specification:
The apdetected file extension appears to be mainly related to Apple iPhoto, a digital photo editing software for Mac OS X operating system and used for one of its file types. iPhoto was replaced by Apple Photos app.
These apdetected files are generated during photo importing, perhaps for indexing purposes.
The default software associated to open apdetected file:
Company or developer:
Apple, Inc.
Apple iPhoto is photos managing application for Mac OS X. iPhoto is distributed with the Apple iLife Suite. Apple iPhoto is able to organize, improve, print and share on-line your photos.
List of recommended software applications associated to the .apdetected file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open apdetected file, edit apdetected file, convert apdetected file, view apdetected file, play apdetected file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with apdetected file - Apple iPhoto data
Click on the software link for more information about iPhoto. iPhoto uses apdetected file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).
Apple macOS / Mac OS X:
Main software associated with apdetected file by default: iPhoto
Other suggested software: Apple Photos