VMware Fusion BIOS Setup Loads Too Fast? Fix It

If your VMware Fusion virtual machine skips the BIOS setup screen or loads it so quickly you can’t press a key in time, the fix is to add a boot delay or change the firmware type in the VM’s configuration. This article explains why the BIOS screen flashes by, how to slow it down, and how to access the BIOS reliably on both Intel and Apple Silicon Macs.

Why the BIOS Screen Disappears So Quickly

VMware Fusion, like other hypervisors, emulates a BIOS (or UEFI) that runs before the operating system boots. On modern hardware and with fast NVMe virtual disks, this firmware stage can complete in under a second. The VM doesn’t wait for you to press a key unless you specifically tell it to. By default, Fusion is set to boot straight into the installed OS, so the “Press F2 to enter setup” prompt appears and vanishes almost instantly.

This is especially noticeable on Apple Silicon Macs (M1/M2/M3) where the emulated firmware is optimized for speed. On Intel Macs, the same behavior occurs but sometimes with a slightly longer window due to slower I/O. The key point is that the BIOS screen isn’t broken—it’s just faster than your reaction time.

How to Add a Boot Delay in VMware Fusion

The most reliable way to catch the BIOS screen is to insert a delay before the firmware starts. Here’s how to do it:

1. Shut down the virtual machine completely (not suspend, but power off).
2. Open Terminal on your Mac.
3. Navigate to the VM’s bundle directory. The default location is ~/Virtual Machines/, but you may have stored it elsewhere. Use cd ~/Virtual Machines/YourVMName.vmwarevm.
4. Open the .vmx file with a text editor: nano YourVMName.vmx (replace with the actual filename).
5. Add the following line at the end of the file:
   bios.bootDelay = "5000"
   The value is in milliseconds, so 5000 = 5 seconds. You can adjust it to 3000 or 10000 as needed.
6. Save the file (Ctrl+O, then Enter, then Ctrl+X in nano).
7. Start the VM again. The BIOS screen will now stay visible for the specified time, giving you plenty of time to press F2 (or the key shown on screen).

If you prefer a graphical method, some versions of Fusion have a “Boot delay” option in the VM’s settings under Advanced or Startup. However, the .vmx edit works across all versions and is the most dependable.

Accessing the BIOS on Apple Silicon Macs

On Apple Silicon Macs (M1, M2, M3), VMware Fusion uses a different firmware path. The virtual machines are ARM-based, and the BIOS/UEFI implementation is different from Intel. To enter the firmware setup on an ARM VM:

• Power on the VM and immediately press F2 repeatedly (or the key shown on the bottom of the screen).
• If that doesn’t work, try Esc or Delete—some ARM firmware uses these.
• If you still can’t catch it, use the boot delay method above; it works on ARM too.
• Alternatively, you can temporarily change the boot order in the VM settings to boot from a CD/DVD or ISO, which forces the firmware to show a menu.

Note that some older ARM VMs may only support UEFI, not legacy BIOS. The key to enter setup is usually displayed briefly—using a boot delay is the only way to guarantee you see it.

What If You Need to Change BIOS Settings Permanently?

If you need to change a BIOS setting (like enabling VT-x, changing boot order, or setting a password), you can also edit the .vmx file directly for many options. For example:

• firmware = "efi" or firmware = "bios" to switch between UEFI and legacy BIOS.
• pciPassthru0.present = "TRUE" for hardware passthrough (only on Intel).
• vhv.enable = "TRUE" to enable nested virtualization.

However, some settings are only accessible through the BIOS setup screen. In that case, use the boot delay trick, make your changes, and then remove the delay line from the .vmx file to restore fast booting.

Common Problems and Their Fixes

Here are a few issues you might run into:

• Boot delay doesn’t work: Make sure you edited the correct .vmx file. The VM must be powered off, not suspended. Also, check that the file doesn’t have a read-only attribute.
• F2 isn’t recognized: Try other keys like F1, F10, Esc, or Delete. Some OSes (like Windows) may use a different key to interrupt boot.
• The BIOS screen appears but the keyboard doesn’t respond: Ensure the VM window has focus (click on it). If using a Bluetooth keyboard, it might not be connected until the OS loads—use the Mac’s built-in keyboard.
• You see a black screen instead of BIOS: This can happen if the VM is configured to boot from a network or if the display resolution is set too high. Try pressing F2 anyway—the BIOS may still be listening.
• After changing BIOS settings, the VM won’t boot: Reset the VM’s firmware by deleting the .nvram file in the VM bundle (make a backup first). This restores default BIOS settings.

Comparison: VMware Fusion vs. VirtualBox vs. Parallels

If you’re struggling with the BIOS screen, you might wonder if other virtualization tools handle it better. Here’s a quick comparison:

• VMware Fusion: Fast boot, but you need to add a boot delay manually. Best for macOS integration and broad OS support.
• VirtualBox: Includes a built-in boot delay setting in the GUI (under System > Motherboard). Easier for beginners, but performance is generally lower.
• Parallels Desktop: Automatically skips BIOS for most OSes, but offers a “Boot from BIOS” option in the VM menu. Very user-friendly but less flexible for advanced BIOS tweaks.

If you only need to access BIOS occasionally, any of these work. But if you’re a developer testing firmware or bootloaders, VMware Fusion’s .vmx control is the most powerful.

Is It Safe to Edit the .vmx File?

Editing the .vmx file is generally safe if you follow these rules:

• Always make a backup of the file before editing.
• Only add lines that are known to be valid (like bios.bootDelay).
• Use a plain text editor; don’t use Word or Pages.
• Don’t change values that you don’t understand—an invalid setting can prevent the VM from starting.

If you make a mistake and the VM won’t start, you can restore the backup or remove the problematic line. In the worst case, you can create a new VM and attach the existing virtual disk to it.

Frequently Asked Questions

How do I press F2 in VMware Fusion if the BIOS screen flashes instantly?

Add bios.bootDelay = "5000" to the VM’s .vmx file. This gives you a 5-second window to press F2. You can also try pressing F2 repeatedly as soon as you power on the VM—sometimes it registers even if the screen hasn’t appeared yet.

Why doesn’t the BIOS screen appear at all in VMware Fusion on my Mac?

This often happens when the VM is set to boot from a virtual disk that already has an OS installed. The firmware detects a valid bootloader and skips the setup screen. Using a boot delay forces it to show. Also, check if the VM is in “Secure Boot” mode—that may hide the BIOS splash.

Can I permanently disable the BIOS splash screen in VMware Fusion?

Yes, by default the BIOS splash is already very brief. If you want to remove it entirely, you can set bios.bootDelay = "0" (or remove the line) and also set bios.splash = "FALSE" in the .vmx file. This is useful for headless or automated boots.

What is the difference between BIOS and UEFI in VMware Fusion?

BIOS (legacy) and UEFI are two types of firmware. UEFI is newer, supports larger disks, and has faster boot times. In VMware Fusion, you can choose which one to emulate by setting firmware = "bios" or firmware = "efi" in the .vmx file. Most modern OSes work with either, but Windows 11 requires UEFI.

Does the boot delay affect VM performance?

No, the boot delay only adds time before the firmware starts. Once the OS loads, performance is unaffected. You can remove the delay after you’re done with BIOS changes to restore fast booting.

Can I use a boot delay on a VM that is already running?

No, you must power off the VM, edit the .vmx file, and then power it back on. The delay is only applied at the start of the boot process.

Related

• Fix Microsoft Teams Not Detecting Camera
• iPhone Camera Freezing? Fixes That Work
• Microsoft Edge Status Invalid Image Hash Error Fix