Can you use Automator to tell Finder to move files in a particular folder to a different location after the specific files are a certain age?

You can use launchd to run a script daily.

The script would move files that are older than 7 days (based on the access time) from the Downloads Folder to the Desktop (edit as needed):

#!/bin/bash

seven_days_ago=$(date -v -168H +%s)

for f in ~/Downloads/*

do

if [ -e "$f" ] ; then

if [ $(stat -f %Da "$f") -lt $seven_days_ago ]; then

mv "$f" ~/Desktop

fi

fi

done

Put this script in your favorite Folder (I use ~/Library/Scripts)

Now to trigger the script daily, place this launchd plist in ~/Library/LaunchAgents/, and edit for the location of the script, and when you want it to run (I have it at 8:24pm daily). Reboot (or log out and back in) for the launchd to take effect.

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

<plist version="1.0">

<dict>

<key>KeepAlive</key>

<false/>

<key>Label</key>

<string>com.tonyt.MoveFiles</string>

<key>ProgramArguments</key>

<array>

<string>/Users/Tony/Library/Scripts/MoveFiles.sh</string>

</array>

<key>StartCalendarInterval</key>

<dict>

<key>Hour</key>

<integer>20</integer>

<key>Minute</key>

<integer>24</integer>

</dict>

</dict>

</plist>

And if you want to use an Automator Calander Alarm instead of launchd, use the Filter Finder Items Action:

You need to add the Get Folder Contents action after Get Specified Finder Items

(However, I'm not sure how it would work as a Calendar Action, i.e. how to set up for multiple dates)

Why not just use Find Finder Items ?

You could also just add this to your login items and have ti run when you log in.