The 1.2 version of MetaPDF for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus.
The most popular versions of the software are 1.2 and 1.0. The latest version of the application is supported on Mac OS X 10.9 or later. The program lies within Productivity Tools, more precisely Office Tools. The actual developer of this Mac application is By Mr. Fridge Software. This app's bundle is identified as com.mrFridge.MetaPDF.
From the developer:
Edit PDF metadata, so your PDFs are displayed with the correct title, subject and date.
Also, you can assign keywords to your documents to group them in a context and to find relevant texts easier.
You may want to check out more Mac applications, such as PDFMergeThing, Gordon or CryptoEdit, which might be related to MetaPDF.