How to enter or access iMac BIOS step by step

In case you still do not know what the BIOS of your iMac device is about, in this post we will teach you the details of it and how it will help you in various ways if you find yourself in a complicated situation.

The BIOS of your PC is the essential tool with which your computer allows a special boot sequence to be initiated, which is activated when the device is turned on. Within iMac devices, what is known as BIOS is correctly called OpenFirmware.

Which is used in a normal way, when you need to boot your iMac through an external boot device, in such a way that you proceed to erase all the settings of your iMac or if failing that, you need to boot either by means of a Linux CD. It should be noted that you can also configure BIOS so that your Windows computer has a better boot .

One of the reasons why users prefer to use OpenFirmware is due to its easy access.

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How to access iMac BIOS step by step?

  1. To begin you must proceed to turn on your iMac device, holding down the power button firmly.
  2. Once your device is turning on, proceed to start OpenFirmware which you can start if you hold down the “Command ” plus “Option ” plus “O” and “F” keys simultaneously.
  3. Once you do this, you will be able to hear two chimes sound, to which you must proceed to wait for the next command to be activated, which you can verify because “ok” will appear on the screen momentarily
  4. After this screen disappears, you will see that the command line will make a change and now “0> ” will appear.
  5. After that, you must enter any command in which you will open OpenFirmware, just after the “0>” indication.

With this you will have already accessed the BIOS from your device in a few steps; however, it is important that you follow these steps rigorously for the sole purpose of maintaining the continuity of the steps described here.

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What is macOS safe mode?

This is an option which is used on occasions when your Mac device cannot turn on and thus complete the automatic session start process . For this reason, using this mode can help you solve this problem in a simple way and without the need to resort to other tools that could damage your PC.

However, this method is known to be a special boot method which was uniquely designed to minimize and resolve various errors that can occur when resolving different errors.

It is for this reason that several of its functions are limited or more simply, they are not found in a common way as they would with the normal login of the computer.

One of the clearest examples of this is reflected in the deactivation of graphic acceleration, which is why it is possible that our screen flickers at some moments during power-up.

Likewise, another factor that will be affected will be the Wi-Fi network, which may not work properly and therefore, it will not be possible to exchange files successfully.

In general, when accessing the safe mode login, our system will do a special verification of the boot disk, in which it will try to solve the various directory problems, as well as the loading of only the kernel extensions , which are essential.

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