I'm pretty sure I haven't changed any setting or installed anything other than software updates, but today I've started getting this dialog when I clicked a magnet link:

enter image description here

How do I get rid of this dialog? I've clicked okay once, but then I've clicked another magnet link and got the same dialog again. Why did it suddenly start and how do I get rid of Safari constantly asking about it?

I'm on macOS 10.12.2/Safari 10.0.2

  • Same thing is now happening for me with Vuze - would love to be able to stop it. – Jordan Reed Dec 28 '16 at 6:33
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    Looks like macOS 10.12.2 Update caused this security setting in Safari. I swapped to Firefox to avoid it for now. Using spctl to sign Vuze didn't fix it. – Jordan Reed Dec 28 '16 at 21:50
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    I mean just once at the first time might be a good feature, but how is this even a "feature" when it repeatedly asks every time I use the same app on even the same site! – Can Poyrazoğlu Dec 28 '16 at 23:01
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    Same problem here. This seems to be a new security feature that doesn't have an obvious pref to turn it off, and the answer isn't "sticky": it asks every time. We use this feature internally to launch FileMaker (with an "fmp://" URL) for our users via a URL, so this is disruptive and we'd like to turn it off, at least for FileMaker. – JohnEDee Feb 6 '17 at 20:43
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    @JakubSrnka of course it's a security settings and IMO it's a good one. However, constantly asking every time after the first one decreases user experience. – Can Poyrazoğlu Nov 23 '17 at 15:25

If the application you want to use is already running (or is in the dock), you can drag and drop the magnet link onto the application's dock icon to avoid the dialog.

There's also a discussion on the Transmission forum on this. The dialog that appears when clicking on such a link seems to be a Safari security feature that currently can't be disabled.

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I was able to eliminate the message by treating it as an extension conflict.

  1. Safari > Preferences: Extensions.
  2. Disable all extensions and test.
  3. Reenable extensions one at a time, retesting after each one.
  4. Update or uninstall the conflicting extensions.
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  • Are you sure you're talking about the same message as shown in the screenshot? I'm seeing the message even with Extensions turned off, and it doesn't seem to be Extension-related anyway...it's a core part of Safari. My guess is we'll need a "defaults write" way to turn this off, if such a setting for that exists. – JohnEDee Feb 6 '17 at 16:20
  • My solution works for me. With the Kablock! extension enabled, I get the annoying message in situations similar to the one you displayed. With it disabled, I don't. I lack the expertise to say more than that or speculate on why my experience might be idiosyncratic. – Bryan Feb 7 '17 at 0:46
  • I see what you mean: some Extensions can trigger the same message by trying to open apps themselves. But this issue can happen without Extensions at all, simply by giving Safari a URL to open that the Mac associates with an application. An example is a "mailto:" link: although the dialog that Safari pops up is a little different, it's the same issue. For example, try a link like mailto:feedback@apple.com in Safari and it should trigger the dialog. (I tried to create the link here in the comment, but can't get it to work). We encountered it with using FileMaker links, i.e. "fmp://" – JohnEDee Feb 8 '17 at 1:32
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    I have no extensions at all, so that's not the root issue. – Zonker.in.Geneva Mar 6 '17 at 11:44
  • I don't use any extensions at all. – Can Poyrazoğlu Mar 20 '17 at 22:40

I have a set of interactive displays to control my entertainment center via calls on iRed. The change in Safari rendered these useless. I tried to circumvent the warning dialog but finally gave up. Until this warning can be avoided, I switched to the Vivaldi browser. It works perfectly and I'm able to use my entertainment center again without a multitude of remotes.

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