We recommend our students to resize their images to 10mb or smaller before uploading them to Smashcut.
Open your image in Preview by double clicking or right clicking and scrolling to preview
If using Preview, click on tools in the top menu and select "adjust size"
Resize your image until you see it is smaller than 10mb
Please check this helpful tutorial How to Resize a Photo on your Mac laptop or Computer
In Paint, open your image by opening up the File menu, and then clicking the “Open” command
Find and select the image you want to resize, and then click the “Open” button
On the Home tab of the Paint toolbar, click the “Resize” button
Select the percentage you want, or the desired dimensions, and then click the “OK” button.
Choose any size smaller than 10mb
See more tips by checking How To Reduce Image Size On Windows 10