While Windows has a configurable size limit imposed on its trashbin, OSX has nothing.
Apple's OSX does not have a mechanism to manage the trashcan. I found a simple and easy way over on the discussions.apple.com forum and turned it into a repository on GitHub: https://github.com/Mausy5043/OSX-EmptyTrash.OSX-EmptyTrash helps to manage the trash. An Applescript is offered that allows one to remove old files from the trash on a regular basis. Once a day (default: 17:00) the Trash is checked. Files that have been in the trash for longer that the preconfigured amount of time (default:7 days) are automagically removed (default: 7-pass overwrite).
A .plist file is provided to automate the task by adding it as a LaunchAgent.
