Problems with Installing on FP4

I am trying to flash a FP4. But the easy Installer is stuck at "searching for your device“.
I already tried different types of cables and the connection for loading the phone over the Laptop is also functioning.
Do I have to adjust that the Laptop is controlling the phone (under USB-settings, pull down window from above). I dont think that would be the solution.
Thanks for your help!

PS: I am using a mac

Did yoi activate USB debugging in the developper options?

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Macs come up from time to time in the context of the Easy Installer, perhaps the search has something …

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Thank you now it worked. but I have another problem:
typed OEM, started bootloader but the installer says: “installation of user-specific operating system on your device not authorised“
Did I forgot something?