It’s at least a common issue on most Apple systems. To be fair, SDL runs on too many different systems that I don’t own for me to say that it only happens on Mac/IOS.
(I don’t own a Mac either, I just happened to remember the issue from reading through this post, which was a recommended by Peter87 here to explain why it’s important to call SDL_RenderClear() even if you have a background image that fills the whole screen)