5 world wide used Free video Player that can Play MTS on Mac and Windows
mts player
1

MTS Video Player (mts, m2ts, mxf, avchd, siff supported)

A powerful video player that could play camcorder videos, Blu-ray disc, folder, ISO file and HD videos (mxf, hevc, xavc-s, mts, m2ts, siff) files fluently and clearly..

Supported OS:

Windows 7 and Windows 8

Mac OS X 10.7 and 10.8 Mountain Lion

vlc mts player
2

VLC Player (mts, m2ts, mod, avchd, 3D supported)

VLC is a free and open source cross-platform multimedia player and framework that plays most multimedia files as well as DVD, Audio CD, VCD, and various streaming protocols.

Supported OS:

Windows 7 and Windows 8

Mac OS X 10.7 and 10.8 Mountain Lion

storm codec media player
3

Storm media Player (CN)

Play Any Camcorder AVCHD MTS videos.

Supported OS:

Windows XP/Vista/7 and Windows 8

Mac OS X 10.7 and 10.8 Mountain Lion

4

KMP Player

KMP is a versatile multi media player which can cover a various different types of contained formats.
Without any separate Codec, you are able to play any media files because KMP has its' own internal Codec.

Supported OS:

Windows XP/Vista/7 and Windows 8

5

Media Player Classic

MPC-HC is an extremely light-weight, open source media player for Windows®. It supports all common video and audio file formats available for playback. We are 100% spyware free, there are no advertisements or toolbars.

Supported OS:

Mac OS X 10.6, 10.7 and 10.8 Mountain Lion

Conclusion

All these 4 above listed video player can Play MTS on your window or Mac, there is no need to find another MTS player to open MTS video now. You can take any one of them as MTS Player to Play AVCHD HD MTS/M2TS and other videos on your Mac os x and Windows.