Chosen Solution

Hi, my iMac is stuck in a white screen when i turn it on. I already tried everything like shift, option + r and stuff like that. I don’t know what to do anymore

A white screen is usually indicative of a failed hard drive. It is not seeing a drive or a system. Try booting from an external USB source.

Before you do anything to solve the Mac frozen screen, try an easy fix: check your peripherals. Try to disconnect all of them (printers, scanners, USB devices, etc.) with the exception of the keyboard and mouse. If it fails and your MacBook won’t load, check out other possible ways to wake up your Mac.

  1. Boot into safe mode
  2. Reset PRAM/NVRAM
  3. Use Disk Utility to verify or repair disks
  4. Reinstall macOS Hope this will be helpful.