Safari 9 - I cannot install extensions

I don't know how to fill that report but could you report one with the OTHER bug : some of us can ONLY install extension from the store but not from files / 3rd parties.

27/10/2015 18:55:11,000 kernel[0]: Sandbox: com.apple.WebKit(486) deny(1) file-read-data /Applications/Safari.app

27/10/2015 18:55:11,000 kernel[0]: Sandbox: com.apple.WebKit(486) deny(1) file-read-data /Applications/Safari.app/Contents

I get tons of those sandbox / deny errors - even with SIP deactivated and permission "fixed" (obviously, something is very wrong with them). And it's from a clean install (tried 3 times... -_-)

Thanks :/

Posted this a little farther up-thread, wondering if it might help you:

I was able to fix it by deleting all of the .plist files relevant for Safari - that may be another option in the future if anyone is a bit twitchy about deleting their whole Keychain. The one thing to remember to do in that case would be to export bookmarks.

For reference, I deleted these files, and the entire Extensions folder:

users/[yourusername]/Library//Preferences/com.apple.Safari.Extensions.plist

users/[yourusername]/Library/Preferences/com.apple.Safari.plist

users/[yourusername]/Library/Safari/Extensions

You may want to try deleting com.apple.Safari.Extensions.plist and /Library/Safari/Extensions first, see if that fixes it, and if not, delete the com.apple.Safari.plist last (if retaining your general Safari preferences is important to you).

If ~/Library/ doesn't show for you, it's because Finder is set to hide system files. To show them, you have two ways, depending on whether you're comfortable using Terminal commands or not.

How to show/hide system files using terminal

How to show/hide system files using TinkerTool, a Mac app

>> When you run TinkerTool, you'll want to select the Finder option at the top navigation bar, and click "Show hidden and system files," then click Relaunch Finder at the bottom. You'll be able to find the above folders and files after that.

Let me know if that helps. It did the trick for me, and doesn't require messing with Keychain (which is more of a pain, in my opinion).

Tried this on my side; no luck at all. 😟 SOOO sad. :/

Btw

27/10/2015 18:55:11,000 kernel[0]: Sandbox: com.apple.WebKit(486) deny(1) file-read-data /Applications/Safari.app

27/10/2015 18:55:11,000 kernel[0]: Sandbox: com.apple.WebKit(486) deny(1) file-read-data /Applications/Safari.app/Contents

I have the same lines on a fresh account that CAN install the extensions AND output this errors anyway. Crazy. I guess I'll wait for a fix, can't lose more time over this. 😟

I'm wondering - are there extensions you'd like the actual .safariextz files to save and install manually that way? I can copy & send the files to you, if you'd like?

I guess it's a bug, I hope for a fix too.

(So annoying!)

Aliiien: thank you for your reply, I need to do a backup, then I'll try what you suggested. But if for cafeine didn't work I doubt it will work for me.

I already have the .safariextz, and they're exactly the files that don't work.

I know I deleted more prefs than I listed the first time; I figured those [three I listed] were the ones that did the trick, but possibly wrongly. Went back through and found all Safari-relevant files that *could* be deleted without breaking things:

~/Library/Caches/com.apple.Safari

~/Library/Caches/com.apple.safaridavclient

~/Library/Saved Application State/com.apple.Safari.savedState

~/Library/Synced Preferences/com.apple.Safari.plist

~/Library/Synced Preferences/com.apple.SafariServices.plist

And the three I listed previously:

~/Library//Preferences/com.apple.Safari.Extensions.plist

~/Library/Preferences/com.apple.Safari.plist

~/Library/Safari/Extensions

If you want to try deleting (not just move to trash, but fully delete) all of those, that may reset enough of Safari for the extensions gallery to recognize the version number. At your own risk, etc etc etc., but that's what finally made it click on my end.

And again, back up everything first, just in case! 🙂

Either way, let's hope Apple gets this bug fixed asap.

I'm reinstalling from scratch for the 3rd time to check one last time if I can pinpoint the problem. Maybe it's just an OSX bug and then I'm ****** and will not use safari until a fix. And I **** hope it's not that, I love that browser. WITH THE RIGHT EXT. -_-

I admire your determination. Let me know if you find something useful.

I hope that the developers are aware about this problem and not only about the opposite one...

I suggest to not install 10.11.1 before trying to install any extensions.

SO, I managed to install everything (I started with that). I'm pretty sure that I accused Little Snitch a bit too fast : seems it's the icloud sync of the keychain that at the heart of the problem. If I terminate that icloud sync and delete the full keychain folder (the user one) it seems to work.

I have a dev friend @ apple and he made sure those 2 bugs are examined.

Can't thanks enough Carbon Copy Cloner in all this : the fact I had full backups of 2 old installs to reinstall / test / access my old files at all time was a lifesaver. But yep, the keychain needs some love for sure !!!

I'm glad that you have found a solution!

I'm not at home right now, so I will try to do this as soon as I am at home.

So: I have to uncheck, in the system preferences - iCloud - the keychain voice.

Then erase the keychain folder (aka: ~/Library/Keychains/)?

Yep ! Don't forget to uncheck the icloud / Keychain sync before or it will redownload the problematic keychain right away... 😉

I can confirm this. I solved the issue the same way after deleting files in the keychain Library folder and adding the old ones back in one at a time. Labor intensive but worth it to define the problem better. Unchecking iCloud services in Preferences made a huge difference but only after throwing out and replacing the keychain files. Make sure you back up the old files before you go through this process. The only downside about this solution for me was losing my saved passwords in Safari. Not really a big deal if you keep a secure backup of your password info. You must shut off or disable any anti-virus software extensions that monitor websites within the browser BEFORE you fix the keychain problem and the synching problem with iCloud services. All this occurred as a result of updating to the new operating system.

Thank you for your replies,

A dumb question: I really need to restore my old (from a backup) keychain files?

Because It's not a problem to me writing the passwords again (one by one).

It didn't work... :/

Do I have to do something else?