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I am disappointed that the Folder Actions processes are crashing and still looking for a better solution. Click ‘Force Quit’ from the resulting dialog box. Select the process and click the small ‘x’ stop sign icon in the top left corner of the window. The workaround is to launch Activity Monitor (Utilities folder inside Applications folder) and look for processes highlighted in red. Apparently Folder Actions are a known issue in OS X Yosemite I had thought that the issue could be resolved with a RAM upgrade, but having recently done that, we are still experiencing problems.
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In day-to-day use they seem to crash fairly regularly. It seems that the AppleScript Folder Action processes are not 100% reliable.
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Update : In production use, this technique has proved problematic.
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