Resolved pram reset

[darkweather]

when i do a "pram reset" imac starts with windows blue screen error. (normally it starts with os x witout pram reset)
i have no windows partition on my mac. once i install and deleted it. so what is the problem and what to do?

 

[kohlson]

This looks like a Windows error message. Somehow your iMac has been instructed to boot as a Windows system, and it cannot find the necessary boot files (which you have since deleted). To reset PRAM (aka NVRAM) follow these instructions: https://discussions.apple.com/docs/DOC-3603

You may be able to boot into Recovery Mode (typically Option R). From there, you may be able to set the correct Mac boot location (Prefs Startup).

 

[darkweather]

i -somehow- see the EFI partition in finder and delete the folder WINDOWS in BOOT folder.