How to Compress a Video on a Mac – 6 Best Ways 
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Way #1. How to compress a large video file on a Mac with the Movavi converter
Step 2. Load the video
You can simply drag and drop the video file that you want to convert into the window, and this will load the video file.
Step 3. Select presets
Under the Video tab, you will get a vast selection of presets, allowing you to choose the correct settings to shrink video file size on Mac. The software will show the estimated file size and will enable you to select the compression rate.
If you want to reduce the MP4 file size on your Mac even further, click the estimated output size and choose the desired value.
Step 4. Compress
Hit the Convert button on your Mac video converter; this will send a new, compressed file to the Movavi Library folder or whichever other folder you have set as the default.
Way #2. How to compress a video in iMovie
Step 1. Load and edit video
Import your chosen video, and if you are comfortable doing so, you can also decide that you are going to edit it, such as topping and tailing the video to reduce the file size.
Step 2. Share the video
You need to click Share within iMovie, which effectively means save or convert, but the button is labeled Share as you can share your videos directly to YouTube, for instance.
Step 3. Adjust the settings
You can change the Resolution and Quality settings in order to reduce the file size of MP4 on Mac or any other mainstream video file type. The software will show you an estimation of the video file size before you export.
Step 4. Export and save
Choose an appropriate place to save the file when you press Export. This might just be on your desktop, and you can then move the file to wherever you want it, such as cloud storage or an external hard drive.
Way #3. How to compress a video with VLC on a Mac
Step 1. Download and install
Step 2. Load and edit video
Import your chosen video by going to File, and then Convert/Stream. Click the Add button and navigate to the video in question.
Step 3. Adjust the settings
Click Customize. You can change the Resolution and Quality settings in order to reduce the file size. On VLC, you can use the Profile dropdown menu, which gives you preset profiles to allow you to save the file as the correct size.
Step 4. Select destination folder and save
To compress MP4 on Mac or any other file type, select your destination folder, where the file will export to. You can then press Save, which will begin the process.
Way #4. How to compress video files on a Mac with QuickTime Player
Step 1. Import your video
In the File menu, select the Open File option and locate the video file you wish to compress.
Step 2. Adjust the export settings
Before you export your video, select the export settings. Click Export As and then select the appropriate option.
Step 3. Save the result
Save the compressed video file by clicking the Save button.
This is it! QuickTime is probably the most straightforward free video compressor for a Mac you can find.
Way #5. How to compress video files on a Mac without losing quality with Online Video Converter
Way #6. How to compress a video on a Mac with FreeConvert
How to choose software to compress video size on a Mac
Tips for compressing videos on a Mac
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