Q: trust this computer

yes, for sure, was it the wrong answer?

Hi Adam, any update?

Hi Adam, as I wrote in my initial post; an iMac but here are all details

and

regards

Gerold

unfortunately it does´t solve the issue.

I deleted all files in the lockdown folder (without need the administrative password) but when I after deleting connected one of my devices, iTunes does´t start (as it should) and I don´t see the device in iTunes (when it is for sure connected).

Any other idea?

Thank for helping.

Hello world,

it looks like that I solved the issue. Beside those issues my iMac went also slower that I thought he have to. After searching for a while I found one post who told me to kill the cloudd process because this makes the iMac slow (after update to Yosemite). But the process just took 1,2% of CPU load; so this could´t be the issue.

After a while I found a post (from apple) who said, a SMC and PRAM reset could do magic after a update.

So it was!

After PRAM Reset, the computer runs that fast as I thought he must; second just one more "trust this computer" and my devices will show up again in iTunes (but still not automaticly when I connect the device). So maybe this could help also other users with the same problem.