When you attach a file to a record in QuickBooks Mac the file will be copied into the attachments folder and renamed to what is known as a GUID - a globally unique identifier. This GUID is then stored in the QuickBooks record. When you revisit the screen with the attachment QuickBooks uses the GUID to find the file within the attachments folder.
It doesn't ever rename the original file you attached.
You can print the attachment with the form. In the Enter Bills window for instance you'll see in the top right of the toolbar the attachment icon. It starts out as a paperclip but if you attach a file (or several) it will change to a paperclip on a "piece of paper". If you click on that icon you get a pop over window with the attachments to that bill listed.
The original file name will appear as the "title" of the attachment. So it is retained there. You can click on that and rename it if you want.
You can print the attachment by selecting the attachment in that list and clicking on the Printer icon at the bottom of the pop over.
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