Convert PNG to JPG or Convert JPG to PNG
Converting a PNG file to JPG is really easy in Mac OS X, here are the steps:
* Launch the origin PNG file within Preview
* Navigate to the File menu and down to ‘Save As’
* Select “JPG” under the ‘Format’ drop down list
* Click “OK”
Your PNG file now has been converted and saved as a JPG file to the location you specified! If you want you can go back and delete the origin PNG file. Naturally you could reverse the process and save a JPG file as a PNG file to do the opposite conversion.