Download of Astronomer's Proposal Tool 22.4.1 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free Mac app was originally produced by Space Telescope Science Institute.
The latest version of the application can be downloaded for Mac OS X 10.7.3 or later. The most popular version among the program users is 22.4. The software is also known as "APT", "Astronomers Proposal Tool".
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The common filename for the program's installer is aptinstaller.zip. The application lies within Productivity Tools, more precisely Cloud Services.
From the developer:
The Astronomer's Proposal Tool (APT) is used to write, validate and submit proposals for the Hubble Space Telescope.
You may want to check out more Mac applications, such as Aperture Photometry Tool, FLIR Tools or Make My App - Mockup Tools for Developers, which might be related to Astronomer's Proposal Tool.
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