topic EOS Utility connects to EOS R5 Mark II once but not twice without reboot in Camera Software

EOS Utility connects to EOS R5 Mark II once but not twice without reboot

dboris — Tue, 15 Jul 2025 14:38:57 GMT

Hello,

I'm running the latest OSX EOS Utility : EU-Installset-M3.19.0.12.dmg.

And OSX Version 15.5 (24F74).

I tried both Wi-Fi and USB.
I tried reinstalling the software multiple time.
I tried restarting my camera and resetting it's settings.

I tried multiple USB cables.

The connection to EOS Utility is always very unreliable.
Works once, connects, then have a really hard time connecting again, unless I reboot everything.
It's been always the case, but now I really need the app to work through USB in my studio and it won't work reliably no matter what.

Re: EOS Utility connects to EOS R5 Mark II once but not twice without reboot

wq9nsc — Tue, 15 Jul 2025 15:53:34 GMT

Hopefully someone comes up with a solution to the root cause of this problem but in the meantime try using the activity monitor in OSX and force a shutdown of any processes tied to the EOS utility app. This should be a little more convenient than a forced restart.

I recall having to do that a LONG time ago with one of the EOS utility versions for Windows where it wouldn't launch a second time because of a process that wasn't ending properly.

Rodger

Re: EOS Utility connects to EOS R5 Mark II once but not twice without reboot

dboris — Thu, 17 Jul 2025 10:44:34 GMT

Every time I close the WindowsManager, it starts working again.
But this basically forces closes your OSX's session and is far from being convenient.
It's a bit faster than a reboot however.
Was not able to find a EOS/Canon process that would work...

Re: EOS Utility connects to EOS R5 Mark II once but not twice without reboot

dboris — Thu, 17 Jul 2025 11:01:06 GMT

Plus the app randomly crashes so there's no way for me to work with it.