As we know, there are many HD players for Windows OS, but for Mac, it hard to find free players which support ts, mts and m2ts etc. Here I recommend two：

1)VLC player

VLC player is a totally free program that you should already have on your Mac that plays oodles of different video and audio formats, far more than QuickTime and DVD player. It is available for a wide range of operating system, ranging from Linux to Windows, and of course, Mac OS X.

Download and run this application, choose FILE>OPEN FILE, select you VIDEO_TS folder, and that is OK! You can watch your video now:



Tips: Other available formats of VLC player:
MPEG (ES,PS,TS,PVA,MP3) ASF,WMV,WMA, AVI, DTS, AAC, AC3,DivX, mp3, ogg etc.

Free Download VLC Media Player

2) Mplayer for Mac

MPlayer OS X is binary distribution of MPlayer (The Movie Player for Linux) and comes with native GUI in Mac OS X. After installation you can simply (by Drag Drop) play almost all 3ivx, DivX 3, 4, 5 and other codecs files in the window or full screen mode. Rendering of very nice antialiased text-based subtitles is also supported. Click the PLAY button and it will beigin to play:



Free Download MPlayer OS X

Learn more about HD Formats:

What is TS?

“TS” is the abbreviation of Transport stream. It is a communications protocol for audio, video, and data which is specified in MPEG-2 Part 1, Systems (ISO/IEC standard 13818-1)

What is MTS and what is M2TS?

MTS and M2TS are included by AVCHD video. AVCHD (Audio and Video Compression for High Definition) is a high-definition and standard-definition recording format for use in digital tapeless camcorders.

About AVCHD video

AVCHD (AVC-HD, AVC HD) video is recorded using the MPEG-4 AVC/H.264 video compression codec. Audio is stored in either compressed form (Dolby AC-3), or uncompressed form (multichannel PCM). Aside from recorded audio and video, AVCHD includes features to improve media presentation: menu navigation, slide shows and subtitles. The menu navigation system is similar to DVD-video, allowing access to individual videos from a common intro screen. Slide shows are prepared from a sequence of AVC still frames, and can be accompanied by a background audio track. Subtitles are used in some camcorders to timestamp the recordings.

Learn more: http://en.wikipedia.org/wiki/AVCHD

Resource:http://www.aimersoft-mac.com/articles/free-play-ts-mts-m2ts-on-mac.html

Mac DVD Ripper  is an all-in-one DVD ripper for Mac OS X software. This Mac DVD Ripper is an excellent DVD Decryption tool for Mac users to rip DVD to various video formats (including MP4, AVI, M4V, MOV, 3GP, MPG, FLV) and audio formats (MP3, M4A, AAC, WAV, OGG, APE, etc.) for playback on iPod touch, iPod classic, iPod nano, iPhone, Apple TV, PSP, PS3, Youtube (web), Creative Zen, iRiver PMP, Archos, all kinds of video cell phones and digital video and audio players. The Mac DVD Ripper is what godgious you need to put your DVD movies on your mobile devices.
iPod Converter Mac   is the best Video to iPod converter Mac OS X software for you. With the iPod Converter for Mac you can easily convert popular video formats including FLV, MPEG1, MPEG2, DivX, Xvid, WMV, 3GP, 3G2, MOV, AVI, MPEG TS/TP (for HD Video), etc to iPod compatible MPEG-4 videos. And also it is not only and iPod Video Converter for Mac, but it can convert all popular videos to iPhone, Apple TV, PSP, PS3, Youtube (web), Creative Zen, iRiver PMP, Archos, MP4, various mobile phones and many other digital video and audio players.
iPod to iTunes for Mac is so powerful and easy to use that it can transfer iPod video, iPod music, podcast and TV shows from your iPod or iPhone to iTunes library with great ease. On the other hand, it is also Mac to iPod/iPhone transfer software. The music and videos on your Mac, whose formats are supported by iPod and iPhone including AAC, MP3, MP4, MOV, WAV etc., can be directly transferred to your iPod/iPhone with this software, no need to buy music from iTunes music store.