At first I thought it was my internet connection, but after trying on my personal hotspot and multiple wifi networks the issue persisted. Tried to update Anki through the app to see if it would fix (I am on a desktop macbook) and then got the following message in my Terminal:
"Checking for updates…
Unable to check for Anki versions. Please check your internet connection.
Error: Failed to run (1): /Applications/Anki.app/Contents/MacOS/uv run --no-project --no-config --managed-python --with pip-system-certs,requests[socks] --python 3.13.5 /Applications/Anki.app/Contents/Resources/versions.py: Error fetching versions: HTTPSConnectionPool(host=‘*****’, port=443): Max retries exceeded with url: /pypi/aqt/json (Caused by NewConnectionError(‘<urllib3.connection.HTTPSConnection object at 0x101b792b0>: Failed to establish a new connection: [Errno 65] No route to host’))"
**** it’s not letting me post this because it’s recognizing this section as a link, but in this ’ ’ section it is pypi. o r g Spacing this out so I can actually post lol.
I’m not sure what’s going on or how to fix this, but it is a problem as no matter what I do I cannot get Anki to sync to Ankiweb and I need to use this across other devices. Any guidance is appreciated. Thanks!
Please also provide information about your system configuration:
What is the model of your MacBook?
What macOS version are you running?
What version of Anki are you using?
From what you wrote, it sounds as if you might not be running the latest version of Anki, 26.05. If you aren’t, you might want to try upgrading to Anki 26.05 by downloading and installing via the .dmg file. (Do not try to update Anki through the Anki app. Install using the .dmg file instead.)
No private relay on or other privacy related things that could be conflicting as far as I can tell. I have a macbook apple m3 pro on macOS Tahoe 26.4.1. I am using Anki version 25.09.4.
I am terrified to update to a newer anki version as when I tried it the last time, I got caught in an endless sigkill loop (an error I read about before on here) and I forget what I did to resolve this but I’m pretty sure I had to revert back to an earlier anki version (likely the one I’m on now since I haven’t updated since). I tried that update by downloading the .dmg file online and got caught in that sigkill loop with no fix no matter what I tried.
That’s fine. Don’t worry about trying to update right now. There are no known issues with syncing in that version or the current version, so I don’t suspect version issues are the problem.
Any idea when you updated to this OS version? Everything, including the fact that it started happening suddenly and recently, points to an issue on your device that is preventing your connection. OS updates can definitely do that.
What about this site – https://sync3.ankiweb.net/abc – in your browser? You should see a “404 Not Found” message if it is successful at reaching the site.[1]
You might want to consider updating your OS to the latest version, macOS Tahoe 26.5.2. I don’t know if doing so will help with this networking issue, but it might be something worth trying. Plus, the OS update contains a number of important security fixes.
Bumping because I have the exact same problem to a T. Checked all firewall, proxy, vpn, etc., as well as updated my MacOS to Tahoe 26.5.2. I am on Anki 26.05. Nothing seems to fix this problem, and it only appeared yesterday. I was able to sync on this Mac a week ago.
The only change is I downloaded a new deck from AnkiHub? But disabling AnkiHub and all other add-ons didn’t change a thing either.
What about this site – https://sync3.ankiweb.net/abc – in the Safari browser? (You should see a “404 Not Found” message if it is successful at reaching the site.)
Checked as in I do not have any firewall, proxy, or VPN active (this includes iCloud Relay). I have the same symptoms as the OP: when trying to sync I receive an error saying “A network error occurred. Error details: error sending request for url ()”.
clicking https://ankiweb.net/decks did initially lead to a connection error, but when I refreshed the page it worked just fine and I could access my decks (including the new one from AnkiHub).
I receive a 404 not found error as expected on the second site.
Problem solved on my end! I switched profiles to “log out” of my Anki account in the app and logged back into my user profile and the problem has disappeared. Sync is working as intended.
It seems to have resolved spontaneously on my end? Yesterday it just happened to connect and sync randomly when I opened it, not sure why. Maybe it was the posting on here either way, last night updated my macOS software to Tahoe 26.5.2, and no changes.
On the updating Anki end - I think I’m going to keep not allowing it to update since I don’t want the sigkill problem to happen again. Has anyone found a true permanent solution for this? I’m still a bit confused as to why this happens to some people.
either way, last night updated my macOS software to Tahoe 26.5.2, and no changes.