Help - MKVToolNix community & help forum

Topic	Replies	Views	Activity
macOS 27 Issue - Checkboxes Missing in Codec Column Heads-up for Mac users: after updating to macOS 27, the checkboxes in MKVToolNix GUI are invisible. You can still check and uncheck each row but without visual confirmation. I can reproduce it on macOS 27 with MKVToolNix…	1	74	October 26, 2026
Welcome to MKVToolNix' support community!	0	2247	June 14, 2023
Desynchronizatation video and audio help	0	13	November 7, 2026
Changing aspect ratio and cropping only stretches the video image	1	36	November 6, 2026
Delete subtitles in bulk by format	0	12	November 2, 2026
Audio offset not applying? help	2	26	October 30, 2026
Fast Forward on H265 MKV files help	0	19	October 28, 2026
Old version mkv toolnix	8	31	October 25, 2026
MKVCleaver dont work	2	21	October 25, 2026
No Check for video and audio	2	22	October 21, 2026
NIX speed during subtitle addition	0	13	October 21, 2026
Quitar un idioma a varios .mkv a la vez	0	13	October 14, 2026
Chapters when merging mkv files	3	28	October 12, 2026
MKVToolNix only in system HD	0	23	October 10, 2026
Regression: MKVToolNix v99/v100 crashes on startup with ASUS Strix Soar driver (v98 works)	7	104	October 8, 2026
Remux Video Audio with Time Stretch help	0	25	October 6, 2026
Header Editor Removes Duration Information	2	43	September 20, 2026
Two titles appearing on a file	5	38	September 16, 2026
Multiplexer imports name starting with version 100	2	30	September 15, 2026
`Execute a program` not receiving the correct data	3	41	September 5, 2026
Error using command line to extract SUB/IDX files from a dvdsub track in MacOS	4	54	September 4, 2026
Question about license	4	49	September 3, 2026
Problems with MacOS and OCLP help , bug	2	487	August 31, 2026
Trying to merge 2 MKV files- fails immediately help	10	933	August 30, 2026
Create a Music Album with MKVToolNix help , specification	5	172	August 27, 2026
Apple Silicon: retirement of Rosetta 2	59	6511	August 16, 2026
Dub Flag in mkv	2	72	August 15, 2026
Aspect ratio changed after splitting file into two files	0	26	August 15, 2026
Splitting by Chapter Sometimes Compresses Output Display Width?	0	29	August 11, 2026
Unable to see or delete embedded subtitle help	2	97	August 10, 2026

macOS 27 Issue - Checkboxes Missing in Codec Column

Heads-up for Mac users: after updating to macOS 27, the checkboxes in MKVToolNix GUI are invisible. You can still check and uncheck each row but without visual confirmation. I can reproduce it on macOS 27 with MKVToolNix…