Wow ! @NicolasH : you saved me! Thanks for all ! Best regards from Nantes and thank you very much once again… everything works again 
And the iPhone and iPad?
George
Olivier
Tu peux surtout remercier wlodek sur ce forum qui m’a expliqué que ce certificat n’était pas installé sur mon mac (probablement à l’occasion de la dernière mise à jour Ventura)
Cela a été le point de départ de mes recherches pour trouver, et finalement installer le certificat.
Par contre, à 7h, je n’ai toujours aucune réponse de la part du support DXO ce qui m’étonne. Sont-ils en vacances ?
Bonnes photos
Nicolas
Pour ma part, je suis en charente maritime
Rah excellent ! J’étais à l’île d’Oleron la semaine dernière, du côté de Chassiron et St Denis.
Je vais assez souvent en Charente, et j’adore y faire du Gravel et bien sûr des photos 
Je vais aller voir tes images.
And thank for all @Wlodek 
Hey there, thanks! That worked on my iMac running Ventura. The Nik Collection and Photolab both connect to the internet now.
I tried to do the same on IOS but I don’t know how to install a certificat and cannot find the good one. But I doesn’t matter; the problem with Mac was to download optic module.
Nicolas
Hi
I have a answer from dxo team
they have identified a problem with my Mac version of Ventura 13 7 7 and are working on it.
nicolas
I’ve had intermittent issues in accessing the forum and main pages, but not the support and downloads. The latest change to my mac was a new version of Safari - and I hope that DxO’s webpage fix will cover the issue with a wider scope … including Safari 18.6 on macOS Sonoma 14.7.7.
The idea behind my question was that you can synchronize them in some way. My wife had so. So maybe a certificate on one will be automatically be installed on the others. I’m not sure, I’ve Android and windows.
George
No
I have found that ios have specific certificate sertigo but I don’t found the good for my system
But if I cannot open dxo.com on ipad ou iphone, it doesn’t matter