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…	0	36	September 16, 2026
Welcome to MKVToolNix' support community!	0	2227	June 14, 2023
Header Editor Removes Duration Information	2	33	September 20, 2026
Two titles appearing on a file	5	24	September 16, 2026
Multiplexer imports name starting with version 100	2	19	September 15, 2026
`Execute a program` not receiving the correct data	3	31	September 5, 2026
Error using command line to extract SUB/IDX files from a dvdsub track in MacOS	4	30	September 4, 2026
Question about license	4	35	September 3, 2026
Problems with MacOS and OCLP help , bug	2	456	August 31, 2026
Trying to merge 2 MKV files- fails immediately help	10	882	August 30, 2026
Create a Music Album with MKVToolNix help , specification	5	84	August 27, 2026
Apple Silicon: retirement of Rosetta 2	59	6432	August 16, 2026
Dub Flag in mkv	2	50	August 15, 2026
Aspect ratio changed after splitting file into two files	0	21	August 15, 2026
Splitting by Chapter Sometimes Compresses Output Display Width?	0	21	August 11, 2026
Unable to see or delete embedded subtitle help	2	69	August 10, 2026
How add tags to a mka file	0	25	August 5, 2026
Batch renaming mkv files with original video title name isntead of filename help	5	105	July 27, 2026
Cut a Single Part of a Video	1	55	July 25, 2026
Does mkclean preserve Dolby Vision in MKV files? help	5	174	July 24, 2026
Merge 2 subtitle fails bug	2	49	July 16, 2026
Cannot find a way to load a BluRay disc image	1	65	July 12, 2026
Regression: MKVToolNix v99/v100 crashes on startup with ASUS Strix Soar driver (v98 works)	3	67	July 9, 2026
Mkv audio track has 2 languages on 1 track, can i remove 1 of them	1	60	July 8, 2026
Have lots of MP4 files to convert to mkv and remove all audio tracks except one and all subtitles	3	116	July 6, 2026
Is there a way to permanently delete tags and global tags by default?	1	138	June 30, 2026
Ffmpeg "Pixelsmash" vulnerability and issue?	4	68	June 25, 2026
Newbie help getting started... If it's even possible! help	13	157	June 25, 2026
Delete bulk sustitles	2	79	June 23, 2026
Bulk Merge Subtitles	2	189	June 7, 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…