You can visit Apple’s official website and look for different paint programs. Apple has the history of providing its customers with different applications and programs, free of cost, available to download directly from their website. If you find a suitable paint program on Apple’s website, click the “Download” button against it and install it on your computer.
You can also visit freeware and shareware websites, which allow their users to download hundreds and thousands of software programs without paying anything. Usually you will find user reviews and ratings against each software program on such website, which will help you make your decision about choosing the right paint program for your Mac.
Also, it is usually safe to download programs from such websites. Yet, you should always try to have an updated antivirus installed in your computer, which will defend any virus that may come with the downloaded program file.
You can also check for views by people on different blogs and forums. Many Mac enthusiasts give their opinions on different software programs they used. So, you can read them, which will allow you to make your decision easily.
If you are looking for something advance, which will cost you some money, then you should first try the free or trial version of that specific program. Many image editing software programs are available on free trial, so that the customers can check the quality of the program, before making a purchase.
If you do not find the trial version of a specific program on the freeware or shareware websites, then you can go to software company’s official website, where you find the trial version of the latest release of the image editing software program.