This article will teach you how to open Sony A6000 MTS files in iMovie on macOS Sierra. Keep reading.
I uploaded some footage from my sony A6000 onto my laptop, Then when i disconnected it and logged into iMovie, it showed all the footage with a “?” and said missing camera and it wont let me upload it anywhere because the media is missing. In order to fix this, I digging in Google and found some clues. If you are in such trouble, keep reading.
FromSony official website, we can easily learn that Macintosh computers do not support AVCHD video recorded in 60p (1080 and 720). If you want to easily transfer video to a Mac, we recommend changing the recording format on the camera or convert MTS videos to iMovie friendly codec-AIC.
Here Brorsoft MTS/M2TS Converter for Mac is highly recommended as the best MTS to iMovie converter under macOS Sierra. With it, you can convert Sony A6000 MTS to iMovie compatible Apple Intermediate Codec(AIC)(*.mov) format with ultra-fast conversion speed and lossless video quality. Besides, more optimal presets like Apple ProRes for FCP, DNxHD for Avid Media Composer are provided as well. Download the program and start conversion.
Change Sony A6000 MTS format to AIC for iMovie
1: Run the best MTS to iMovie Converter on Mac. Then add 1080p .MTS, .M2TS file to the program.
Tip: Check the box of “Merge into one file”, you can join MTS clips together.

2: Go to “Format” list and choose “Apple Intermediate Codec(AIC) (*.mov)” format.

3: Start Sony A6000 60p MTS to AIC conversion for iMovie by tapping the convert button.
After the conversion, click “open” to find the encoded video. Then you can smoothly open the Sony A6000 1080 60P mts file in iMovie for editing via “File > Import > Movies…”.
Read More:
How to Open MTS files in Sony Movie Studio
How to Transfer MTS to Windows Movie Maker
How to Edit Single MTS videos in FCP

This post explains much clearly. I have followed and solved my issues. Thanks a lot!
The software mentioned in this post solved my issue. Nice try!
It’s much simple and effective. I can edit all my MTS videos in iMovie now. Thank you so much!