It's not Apple's issue to fix, I don't know what that person is talking about. On macOS the scroll bar is hidden and only shown when you scroll, over the window's content and gets wider if you mouse over it. It has worked this way since 2011 and it's not going to change. There's a setting to disable it system-wide but 1) I'm not going to enable something that permanently takes away 1% of my screen space systemwide just for this 2) this is the default scroll bar behavior, so most macOS users have this issue where clicking the most important "open torrent" button requires waiting a few seconds for the scroll bar to go away.
Transmission needs to add like 20 pixels of padding after the magnifying glass for the scroll bar if the user is on macOS and has this setting enabled.
If you think you have a solution ("move the buttons anyways"), maybe reply in the issue and help solve a problem for FOSS that seems to annoy some of you.
Put some padding on the UI. I had a quick look and I couldn’t find any app that had UI in the space the scroll bar shows in.
Apple is clearly never changing this as they and every other app developer puts a 10px padding in and it looks better while not having a scroll bar obscure anything.
That comment is 7 years old. I clicked around in Xcode for a bit and it doesn’t anymore.
I didn’t expect “I can’t click “Open Downloaded File” on a file downloading application because the scroll bar is in the way” would generate any discussion. It should be obvious to everyone that it’s an issue and should be fixed.
If you know how to fix it (even if just by written word), please do help them to fix it by sharing the solution, as you don't seem to be the only one who is disturbed by the issue.