You can download TOPCAT 4.1 for Mac from our application library for free. The current installation package available for download requires 29 MB of hard disk space. This Mac download was checked by our antivirus and was rated as malware free. The actual developer of this free Mac application is Mark Taylor, Astrophysics Group, Physics Department, Bristol University. The most popular version among TOPCAT for Mac users is 4.1. The application is categorized as Design & Photo Tools.
From the developer:
TOPCAT is an interactive graphical viewer and editor for tabular data. Its aim is to provide most of the facilities that astronomers need for analysis and manipulation of source catalogues and other tables, though it can be used for non-astronomical data as well.
You may want to check out more software for Mac, such as topCAD, which might be similar to TOPCAT.