Download Old Versions of MKVToolNix: 42.0.0 - 9.8.0 - 8.2.0 - 6.9.1_2014-04-18-ab10 - 5.0.1_2011-10-22-a632
If you experience any compatibility issues with MKVToolNix for Mac, consider downloading one of the older versions of MKVToolNix. MacUpdate stores previous versions of MKVToolNix for you since v. 5.0.1_2011-10-22-a6....