![LinPlug](https://static.kvraudio.com/i/news/officiallogo2012_100x100.png)
LinPlug has updated the Mac OS X and Tracktion-locked versions of RM IV to v4.1.5.
Changes:
- Fixed MIDI receive problem in Tracktion-locked version.
- Fixed Automation problem in AU version.
Note: Only the Mac version and Tracktion version of RM IV are v4.15, the regular PC version and Lite version are still v4.14.