In this tutorial, we will be covering the steps required to change the download location of attachments on Mac Lion Mail App. When you try to save an attachment received in email on Mail App, the attachment will be saved to Downloads folder. Mac Lion users can change the default download folder location using Mac Preferences.
Click the Apple icon and select Preferences from the menu list.
In the General Preferences window, select the value for Downloads folder as “Other”
The “other” option would allow users to specify a folder for downloading the attachments.