I use Hazel to continuously trim downloads. Every time a file is 14 days old it is moved into a 'review' folder and I get a notification about it. This gives me a steady stream of old files to either delete or move into a proper folder.

Sure I could do it in the download folder directly as well, but in reality I had to go through 100s of files every few months which can be annoying.

I wrote about it a few years ago here and I do it still http://jontelang.com/blog/2015/08/17/hazel-is-great.html

Just for fun, I tried to do something similar with a shell script:

    set -eu
    AGE_LIMIT=$(( `date +%s` - (14 * 86400) ))
    for FILE in ~/Downloads/*
    do
	    if [ -e "$FILE" ]
	    then
		    export `stat -s "$FILE"`
		    if [ $st_birthtime -lt $AGE_LIMIT ]
		    then
			    mv "$FILE" "~/Needing review/"
		    fi
	    fi
    done

Run it from cron. Typical caveats of shell scripts apply!

I imagine you could instead do it like this:

  find ~/Downloads -Btime +14d -exec mv {} ~/Needing\ review \;

Some changes may be necessary as I am not able to test it right now

Hazel is amazing. That said... I'm no longer a Mac user.

There are no good Windows equivalents.

I wish I had enough programming knowledge to write a truly cross-platform equivalent.

This is a serious itch I'd like to scratch.

Very smart use of /tmp