Question: how to create a ringtone for iphone on mac?
Answer: Select the song from your iTunes library, right click and tap SONG INFO. [01:14]
Select OPTIONS. [01:21]
Change the STOP and START time. Make sure that the total length of the ringtone doesn't exceed 30 seconds. [01:39]
Right click on the new song, select SHOW IN FINDER. [02:21]