The 6.0 version of NetBeans M9 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. The application belongs to Developer Tools. The most popular version among the program users is 6.0. This software for Mac OS X was originally created by NetBeans. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
The UML performance slows down on a Mac OS platform running JDK 1.5 when the scrollbars appear in the Diagram editor window as a result of manually moving diagram elements. After the scrollbars appear, any action taken on the diagram takes a very long time to complete.
You may want to check out more software for Mac, such as NetBeans M1, Apache NetBeans or ChordPhobia, which might be similar to NetBeans M9.