forbidden parking sign

[GGERARD]

Hi!
When I turn on my iMac (2017 - 16 GB of RAM - Fusion Drive - 4K - Mojave last version), a "forbidden parking sign" appears and, after a few seconds, it starts normally with the apple logo.
Everything else is OK and all my applications work normally too.
What is the problem with this strange start?
Thank you for your help.
GGERARD

 

[Apple fanboy]

Hi!
When I turn on my iMac (2017 - 16 GB of RAM - Fusion Drive - 4K - Mojave last version), a "forbidden parking sign" appears and, after a few seconds, it starts normally with the apple logo.
Everything else is OK and all my applications work normally too.
What is the problem with this strange start?
Thank you for your help.
GGERARD

Do you mean this one?

This means there is a problem with you OS. Try a fresh install of MacOS.

This article explains what to do.

 

[Simple714]

Try a PRAM. If that doesn’t help then re-select your startup disk via system preferences. Be sure to make time machine backups before reinstalling!!

 

[GGERARD]

Thanks Simple714,
My problem is solved with your help.
I've make a PRAM and all is OK now.
regards
GGERARD

 

[Riwam]

Thanks Simple714,
My problem is solved with your help.
I've make a PRAM and all is OK now.
regards
GGERARD

Then you can add "RESOLVED" to the title of the thread.
Happy for you.
Ed