I have shared how o join videos into one on Windows. This is how to do it on Mac.

And, the video converter I am using is still Any Video Converter Ultimate for Mac. You may find it here http://www.any-video-converter.com/products/for_mac_video_converter_ultimate/

Step 1: Add All the Files You Want to Merge to the Program and Set Output Format

Go to the "Convert Videos" panel . Click the Add File(s)/ DVD button (Also through the menu item File-> Add File(s)/ DVD or drag files to the list directly from your disc or other location) to select the files you want to import.

This powerful Video Converter supports all popular video formats including FLV, MPEG1, MPEG2, MP4, 3GP, 3G2, MOV, AVI, M2TS, MPEG TS/TP (for HD Video) etc.

Tips:

1. One file does not support to merge.

2. The videos of merge video can freely add, delete, sort and preview.

Step 2: Set the Profile

Click the required profile in Profile drop list on the main interface. After selection, the selected format will be set for all files on the list.

Tips:

The software supports the decoding and encoding of multiple video formats including:

(1) Popular Video FormatMP4, MOV, AVI, WMV, MPEG-I, MPEG-II, VOB, DV, 3GP, 3GPP2, DVD NTSC, DVD PAL, etc.

(2) HD/3D Video FormatHD Microsoft Advanced Streaming Media, HD AVI, HD MP4, HD MKV, HD MOV, HD M2TS, 3D Red and Cyan Anaglyph MP4, 3D Side-by-side(Left and right) MP4, etc.

(3) Web Video FormatUniversal Flash Video, Universal Flash F4V, Universal SWF, GIF Animation, HTML5 WebM Video, HTML5 MP4 Video, Facebook H264 Video, Daily Motion H264 Video, Flickr H264 HD Video, YouTube H264 HD Video, HTML5 OggTheora Video, etc.

Step 3: Check on "Merge All Video" and Click "Convert Now!" Button to Join Multiple Files Into One.

Click the Convert Now button and then list is empty. Meanwhile all of the files on the list are added to the Task- Pending- Converting list starting the conversion in turn and the countdown begins.

After the conversion is done, it will be deleted from Task- Pending- Converting list, and then added to Task- History- Converted list.

Download the program here to have a try. It is only only a video converter, but also supports downloading Youtube videos and capturing screen activities.