Pixelmator
Used by 20 peoplepixelmator.com ↗

“I use Pixelmator for image and illustration editing.”
Kawandeep Virdee Interview, Maker · via Uses This 
“These days I use Pixelmator for simple image editing because it feels so good on the Mac.”
Adam Wiggins Interview, Hacker, entrepreneur (Heroku) · via Uses This 
“When more advanced photo editing is needed then images get opened in Pixelmator.”
Colin Dismuke Interview, Ocean engineer (Delmar Systems) · via Uses This