This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
Under Windows on a PC, you can right-click on the file name, select
Properties, and adjust the "Read-only" attribute. Checking "Read-only" turns ON
write protection; unchecking it turns write protection OFF.
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By: Jon Bettencourt
On a Mac, you select the file, go up to File --> Get Info..., and click on
"Locked."
By: Rubywand
 
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