For what it’s worth, I was having the same problem (and this is not the first time). I ran the terminal command, quit and relaunched Safari, and then I was presented with the option in the browser to enable the extension. Working great now!
No problem. Now! 
As I said, it didn’t work for me, so I was just asking whether I had to run the maintenance option with more than the one service ticked.
I’m more than comfortable. I was being lazy using Onyx. Except that it turned out to be more work.
I should remember from my days driving in busy cities that shortcuts always take longer.
Now, having run the command, all but two extensions were removed and the two that remained were probably my two least used extensions!
I’ve been able to get BW back, so I’m happy about that.
But I’ve lost and can’t yet get back quite a few others, including Grammarly, Honey, Duckduckgo, and my ad blocker.
There are others which I haven’t been able to restore, but I’m not focusing on them yet.
If you have any ideas why they would not be able to be initiated and/or found, then I’m interested in hearing your ideas.
Thanks
@andrewkr glad to hear about Bitwarden coming back, but surprised about the other extensions. I’d give removing/reinstalling the missing extensions a try first, but much past that I’m unsure. Maybe others who have had a similar experience could chime in?
I had tried reinstalling them. I couldn’t remove them as they had already gone!
Before I sent my last message, I had quit Safari and restarted it but that made no difference.
Last night before going to bed, I shut down the Mac - I was angry at it 
! - something I do only very rarely. Lo and behold, first thing this morning, I turned on the computer, and all is forgiven. All of my extensions are back, albeit deactivated. That was simple to fix. Tick the box on each one and approve the permission to read all webpages.
I said that all of my extensions are back. That’s true, but it includes one which has been doubled up. I’ve still got to figure out that one.
Thanks, Trey! And thanks again to all for the great software.
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Thank you! That worked!
However, now a different extension (Ghostery) is missing and I can’t get that one back… 
Oh well… win some, lose some… I guess…
Hiya all,
this works fine if you type the command
/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -kill -r -domain local -domain system -domain user
but then quit Safari and restart it. Then a question appears if you wish to activate a Bitwarden extension. Click on the button. Then it works signing in again etc.
Thanks for that.
Would be helpful if it was added to Help in Bitwarden for macOS!!!
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Is this still a problem in 2024? I have this problem on a new MacBook Air M3. The desktop app and Brave extension works fine. Safari Settings shows the Bitwarden Extension to be enabled. But when attempting to fill credentials at a website, Bitwarden does not show up as an option. There is still the option to autofill Keychain passwords even though it had been turned off. I have the same problem with MacOS apps so there doesn’t appear to be Finder extension integration either. Is this a Bitwarden or MacOS Apple Silicon problem?
This stopped being a problem just under 2 years, as I recall (using an M1 Mac). Unfortunately, a memory leak in Safari they couldn’t fix resulted in the Bitwarden extension using nearly a GB of memory, so I had to stop using it. I’ve been using StrongBox without any issues for about 4 months now.
Sure wish they could document any incompatibility on Safari Web Extension | Bitwarden Help Center so that people don’t waste hours trying to make it work.
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