Download, install and open it on your Mac. Then you can follow these simple steps: Step 1. Import PDF Files. In the program window, click on 'File' then select 'Open' and choose the locked PDF you want to upload. You can also drag and drop your file into the program window. An example of a locked file: a database manipulation in the Terminal shows repeated “file lock” errors, indicating the given database file is open and locked by another process. With the process ID information we can now look in Activity Monitor and search for the given PID to locate it. I wrote Trash Lock Files because I was fed up in Mac OS X with not being able to delete many locked files in my trash can without having to unlock them all first. Unlike Mac OS 9 where you could.
There are a few things at play here, one actually ticked me off a few weeks back as I have a bunch of users with the same issue with
Creative Suite's files with Adobe Support pointing me to this article in terms of support
https://helpx.adobe.com/photoshop/kb/networks-removable-media-photoshop.html
Lock Folders On Mac
Basically they state that they support working on files locally and the rest is at our risks and peril,
Mac Os Locked File
The other factor is related to Mac OS's Finder, when users set finder to display a preview of the file, it gives the signal to Windows servers that the
file is opened, thus causing a bunch of locked files. I found that shifting the selection from the file to a folder after seeing the preview, will release the file
