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MACBOOK PRO RETINA EFI UPDATE HOW TO
MACBOOK PRO RETINA EFI UPDATE INSTALL
MACBOOK PRO RETINA EFI UPDATE UPDATE
MACBOOK PRO RETINA EFI UPDATE PC
MACBOOK PRO RETINA EFI UPDATE MAC

Nothing can cause panic during the system booting of a Mac like a screen completely going black. Why is my MacBook Pro booting black screen? Watch: MacBook Pro 14 & 16 (2023) - 20 Things You NEED to KNOW!.Solution #13: Turn Off Automatic Graphics Switching.Solution #12: Enter Password, Hit Return.Solution #9: Keypress (Keyboard) Sequence.

Solution #8: Reset the System Management Controller.

Solution #7: Reset Mac’s NVRAM settings.

Solution #6: Start up from macOS Recovery.

Solution #5: Force Reboot your MacBook Pro.

Solution #3: Adjust your display’s brightness.

Solution #2: Disconnect all peripherals.

MACBOOK PRO RETINA EFI UPDATE HOW TO

How to Fix MacBook Pro Booting Black Screen.

Why is my MacBook Pro booting black screen?.

These solutions will also work for a black screen on a Mac mini, iMac, or MacBook Air. This article helps you fix the MacBook Pro Booting Black screen. In this guide, you’ll get 12 solutions to Fix MacBook Pro booting black screen Take a deep breath, and try the tips below before you fork out for a repair or take a trip to your nearest Apple Authorised Service Provider or store. You're likely to immediately start to worry about how much it will cost to fix, but let's not panic yet.

If you see your MacBook Pro booting black screen, something might be a miss.Ī lack of any sign of activity on your MacBook Pro screen is perhaps one of the most worrying issues you can face when booting up your device. Apple posted this in the now archived website About EFI and SMC firmware updates for Intel-based Mac computers.A blank screen (black, blue, or gray) should appear once or more during startup. At some point, Apple decided to include firmware updates in the macOS installs.

MACBOOK PRO RETINA EFI UPDATE UPDATE

You used to manually update the firmware. The APFS is new and older Macs would need a firmware update before being able to recognize this filesystem and read the boot files. Having to update the firmware to run High Sierra makes sense.

MACBOOK PRO RETINA EFI UPDATE PC

Basically, the same procedure occurs for firmware updates on my HP PC running Windows. The firmware is then instructed to update itself. When a SDD or HDD is formatted to use a GUID partition scheme by the Disk Utility or diskutil command, the EFI partition is automatically created.īasically, the firmware update is copied to the FAT32 formatted EFI partition.

Apple posted that firmware updates require a GUID partition scheme at the archived website Firmware updates for Intel-based Macs require a GUID partition scheme, although the site does not explicitly say this must be the primary drive. I assume this EFI partition must be on the primary internal disk. The EFI partition is used when the firmware is updated. Error while writing firmware updater for EFI.

disconnect all internal hard drive, connected the USB external drive and SXCARD reader.

It selected the ESP on internal hard drive as the staging EFI.

kept internal hard drive connected, connected the USB external drive or SXCARD reader.

replaced the Samsung SSD with original Apple HDD and tried again.

Unfortunately the first one of my MacBook is out of order.Ĭonfirmed the following methods do not work. It seems that the root cause is running OS X from a second internal disk. I've just seem a related post Is there any way to manually bless firmware when main disk is external? In another word, the Boot ROM Version hasn't been changed. Then, 3 times power off automatically in a short period, end up with a normal OS X startup. It got a flashing LED light indicating the firmware was about to be updated. sudo bless -mount / -firmware /MBP91_00D7_B00.scap -verbose -recovery

MACBOOK PRO RETINA EFI UPDATE INSTALL

Thus, I've no idea why High Sierra installer failed to update the EFI firmware at the very first time.Īccording to the chapter 2.0 How Does a Mac Update Its EFI Firmware & How Do You Find Your EFI Version of The Apple of Your EFI, with the following command bless, the file MBP91_00D3_B0C_LOCKED.scap extracted from mac2015002efiupdate.dmg, which downloaded from, and the file MBP91_00D7_B00.scap extracted from Install macOS High Sierra.app, it executed successfully. usr/libexec/efiupdater finished with status: 0 Writing firmware update installed cookie (/Volumes/MacSSD/macOS Install Data/.FirmwareUpdateInstalled) Volumes/bless.YdD7/EFI/APPLE/FIRMWARE/MBP91_00D7_B00.scap created successfully If look into previous log of EFI updating, it seems they are quite normal. Operation: Verify firmware failed, Failure Reason: Error Domain= Code=512 Key info in ia.log is as following.Ĭlearing automation and attempting to rebless.įailed to get disk for UUID specified for rebless. Here comes the detail.Īttempt 1 - update it by updating macOS from 10.12.6 to 10.13.2įailed with error message "An error occurred while verifying firmware". In short, the firmware cannot be updated either by upgrading macOS to High Sierra or by bless manually.