Download folder on Mac

Create in Automator a new Workflow with the following actions:

Get Specified Finder Items

Add the Downloads folder to it

Get Folder Contents

Check "Repeat for each subfolder found"

Filter Finder Items

Set "All" of the following are true

"Date last modified" "is not in the last" "30" "days"

Move Finder Items to Trash

You can Save the Workflow as an Application (say, Cleanup.app) in the Application folder.

To schedule the application to run daily:

Add your app (Cleanup.app) to System Preferences -> Security & Privacy > Privacy > Accessibility

Create a User LaunchAgent in your Library (~/Library/LaunchAgents/). It's an XLM file (plain text).

Let's name it com.maclouds.cleanup.plist containing the following code:

<?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>Label</key>
    <string>com.maclouds.cleanup</string>
    <key>ProgramArguments</key>
    <array>
        <string>/Applications/Cleanup.app/Contents/MacOS/Application Stub</string>
    </array>
    <key>RunAtLoad</key>
    <false/>
    <key>StartCalendarInterval</key>
    <array>
        <dict>
            <key>Hour</key>
            <integer>10</integer>
            <key>Minute</key>
            <integer>00</integer>
        </dict>
    </array>
</dict>
</plist>

The value in StartCalendarInterval is set at 10:00 AM. Change the time as you prefer.

In Terminal run the following command to load the just created LaunchAgent:

launchctl load ~/Library/LaunchAgents/com.maclouds.cleanup.plist

If you don't want to play with LaunchAgent and Terminal, there're some apps for scheduling, like Lingon.

Hi Stewart,

this should run every Saturday at 10:00 AM:

<?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>Label</key>
    <string>com.maclouds.cleanup</string>
    <key>ProgramArguments</key>
    <array>
        <string>/Applications/Cleanup.app/Contents/MacOS/Application Stub</string>
    </array>
    <key>RunAtLoad</key>
    <false/>
    <key>StartCalendarInterval</key>
    <array>
        <dict>
            <key>Hour</key>
            <integer>10</integer>
            <key>Minute</key>
            <integer>00</integer>
            <key>Weekday</key>
  			<integer>6</integer>
        </dict>
    </array>
</dict>
</plist>

Basically, only Weekday and 6 are added.

6 is Saturday, 7 is Sunday, 1 is Monday, etc.

Hi Stewart,

I'm glad I helped.

I'm from Italy. I'll keep in mind your offer if I'll drop in Montreal. 🙂

Thanks.