LiveGrade 3.6.3 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application lies within Design & Photo Tools, more precisely Viewers & Editors.
The LiveGrade installer is commonly called pomfort-livegrade.dmg. The actual developer of this software for Mac is Pomfort GmbH. The bundle identifier for this app is com.pomfort.LiveGrade. The following version: 1.0 is the most frequently downloaded one by the program users. LiveGrade is developed for Mac OS X 10.6 or later. We recommend checking the downloaded files with any free antivirus.
From the developer:
LiveGrade is the powerful solution for the right image on the set. It gives you the full control of the color of live SDI signals from digital film cameras. LiveGrade assists you in every aspect related to look and color management on set and supports the exchange of formats such as ASC-CDL, Alexa Looks, 3D LUTs, ICC profiles, and more.
LiveGrade is available only on a subscription basis. Additional information can be found here.
You may want to check out more Mac applications, such as Vectorworks 2010 Viewer, DropImageURL or Polaris, which might be related to LiveGrade.