The following tutorial will walk you through reducing the file size of an image on macOS.
You would like to upload a profile picture to the LMS, but the image I have selected is larger then the 300kb file size limit allotted for profile pictures.
Step 1. Right click (control + click) your image and choose 'Open With -> Preview'.
Step 2. Click and drag a selection around the area you would like to use for your profile picture.
Note: if your image is really large, to help reduce file size even more, you may have to zoom out on your picture before it is cropped.
Step 3. Once you have your selection made choose 'Tools -> Crop'.
Step 4. Once the image is cropped go to 'File -> Export'.
Step 5. In the export settings, give your file a name and choose 'Desktop' as the location. Under 'Format' choose 'JPEG' and for 'Quality' drag the slider halfway between least and best. Click 'Save'.
Step 6. To confirm that your new profile image is under 300kb, right click (control + click) the image and choose 'Get Info'.
Step 7. Under 'General' you will see the new size of your image (in this case our new file size is 70kb).
Step 8. You will now be able to upload your picture to your profile on the LMS, but first you must remove your existing picture.
Step 9. Navigate to your profile in the LMS and click 'Delete' next to your profile picture followed by 'Yes' on the pop up.
Step 10. You will now be able to submit your new profile picture for approval.