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efi boot

  1. S

    Trying to instal High Sierra on Macbook 2011, EFI BOOT?

    Hi guys, I'm trying to install High Sierra on my 2011 Macbook. I've made a bootable USB drive but when I restart (power + option) I only get a 'EFI Boot' drive as an option. If I click it, it goes into a black screen with code then to the Apple loading screen but it is stuck there. Ps. Not sure...
  2. H

    I screwed up trying to revert from Opencore

    I found my 2009 Mac mini in a box and thought I'd experiment with it. I used Opencore Legacy Patcher to install Monterrey and it worked. However, Wifi didn't work as expected and I also had some graphic issues. So I thought that I'd best revert to stock. I fetched a El Capitan bootable USB...
  3. D

    MP 1,1-5,1 Windows EFI missing after updating OpenCore

    I did something wrong when updating Martin Lo's OpenCore package to 0.7.5 today. Now I no longer see the Windows folder in the EFI partition, and OpenCore no longer offers my Windows drive as a boot option. Do I need to reinstall Windows, or is there a simpler way to recreate the Windows files...
    • dksoutha
    • Thread
    • efi boot opencore cmp windows 10
    • Replies: 2
    • Forum: Mac Pro
  4. ZNDK

    MP 1,1-5,1 EFI Boot boot of Mac Pro 2008

    My Mac Pro 2008 always freezes when I click EFI Boot on the bootloader screen. I want to install Windows 10, but I am having trouble booting my Windows media. When I try to boot with a Windows 10 DVD disc, the boot loader screen shows "Windows" and "EFI Boot" will be displayed. I click on...
    • ZNDK
    • Thread
    • efi boot windows 10 installation
    • Replies: 10
    • Forum: Mac Pro
  5. C

    How to create a bootable installer

    I'm recycling some donated computers that Goodwill here resells. Of course these have reached the end of their lifecycle so they usually only support snow leopard. The next step is trying a more recent OS. My first step was to use the standard method to create a USB that would install LION...
  6. S

    MP 1,1-5,1 XFX Double D R9 280X MacPro FLASH

    I was Flashed XFX Double D R9 280X for MacPro with Netkas Script ,am getting boot screen on Lion OS ,but not working on High seira or Mojave ,shows boot screen and shutdown at the middle ,not booting with Windows 10 also ,it has no bios switch .Regarding the old post load balancing ,soldered...
    • streak8047
    • Thread
    • efi boot hd 7950 radeon r9 280
    • Replies: 3
    • Forum: Mac Pro
  7. T

    MP 1,1-5,1 MP 4.1/5.1 Recovery mode/boot screen won't work at all

    Hi! At start I'm very sorry for my English. It's not my mother tounge. I'm quite new in this. All I wanted is cheap Mac device that is quite powerfull so I bought 2009 Mac Pro with HD 5870. All I did was to change graphics card so I bought RX 470 and Installed it. Beacuse I wanted to play some...
    • Teezyiusz
    • Thread
    • black screen blinking dash boot camp boot menu efi efi boot mac pro (2009) recovery mode
    • Replies: 1
    • Forum: Mac Pro
  8. pizzabox

    No Apple Hardware Test on 2012 MBP?

    I am trying to run Apple Hardware Test. When I try to boot into it I get sent to internet recovery, then after a while I get an error on a black screen: Error message: Cannot Load "EFI/DRIVERS/TESTSUPPORT.EFI This thread on the Apple forum suggests it's broken now for older systems. I did...
    • pizzabox
    • Thread
    • 2012 macbook pro 2012 mbp apple hardware test efi efi boot
    • Replies: 2
    • Forum: MacBook Pro
  9. S

    MP 1,1-5,1 Sapphire Radeon HD 7950 3GB EFI FLASH NO BOOT LOGO

    Saphire radeon HD7950 3GB has flashed successfully not getting boot loading of os ,gpuz shows EFI ,the bois rom was attached ,the show the full version number of card 7xxx .
  10. I

    iMac (Retina 4K, 21.5-inch, 2017)

    Good morning all, Has anyone tried using one of these https://ghostlyhaks.com/shop/product/efidl before, or does anyone know if it'd work on an A1418 EMC 3069?
  11. Fan1s

    MBP9,2 ROM224.0.0.0 Downgrade help

    Hi guys, I am a newbie on this forum, but I am a user of macbook for many years. I have home one Macbook Pro mid2012, i5 2,5Ghz. I was changing a motherboard, but it lost my serial number. I have it form bottom of mac. When I look at "about my mac" the field for serial number is empty. I can...
    • Fan1s
    • Thread
    • downgrade efi efi boot serial number smc
    • Replies: 2
    • Forum: MacBook Pro
  12. M

    Problems with EFI Boot

    I have installed Windows 10 on my Mac Pro 4.1 (upgraded to 5.1) in EFI mode, so that I have AHCI enabled. Windows runs fine, but I have one problem: I can boot into Windows when I press the ALT-key and select EFI boot, but when I try to boot into Windows with the startup disk selector, I get the...
    • MriX
    • Thread
    • bootcamp efi boot mac 4.1
    • Replies: 31
    • Forum: Mac Pro
  13. Stephan1337

    OSX First Partition visible and not EFI after Cloning with OSX Installer tool

    Hi, I just tried to move my whole main drive partition (It was just 1 "usable" that I was aware of, with Mac OSX High Sierra) to a new Samsung EVO 850 1TB Harddrive. I had to initialise it and convert it to "GPT"-format with my Windows 10 Desktop, because the installer tool from High Sierra...
    • Stephan1337
    • Thread
    • clone efi efi boot high sierra osx partitioning
    • Replies: 1
    • Forum: macOS
  14. d3vCr0w

    Will any of these Graphic Cards work with a Mac Pro 1.1 ?

    Hi people, thsis is my first post in the forum, I hope I get some help, thanks in advance. I recently got a first generation Mac Pro and I'm looking forward to upgrade the Graphics Card in order to be able to at least install Mavericks or Yosemite on it, since most software I need is not...
    • d3vCr0w
    • Thread
    • boot efi boot graphic card mac pro mac pro (2006) mavericks yosemite
    • Replies: 11
    • Forum: Mac Pro
  15. Bmxlee

    Can't boot SFOTT drive

    I have a Mac Pro 2.1 2x 3ghz quad-core intel Xeon processor, 32GB 667mhz ddr2 FB-DIMM ram. Running 10.7.5 (lion) I've created a SFOTT drive on various different USB sticks and internal drives with different versions of Yosemite. Originally it would boot to a black screen with the apple logo...
    • Bmxlee
    • Thread
    • efi boot mac pro 2.1 sfott yosemite
    • Replies: 5
    • Forum: Mac Pro
  16. tkmj75

    Boot drive selection screen slow/unresponsive in Macbook Pro (Early 2015)

    I have a Macbook Pro Retina 13" (Early 2015) model and a bootcamp partition with Windows 10 installed in it. The dual boot to macOS and Windows was working just fine until about two month ago. I was switching operating systems using the alt/option key at bootup through the Bootup drive selection...
    • tkmj75
    • Thread
    • bootcamp bootup problem efi boot macbook pro sierra startup selection windows 10
    • Replies: 0
    • Forum: MacBook Pro
  17. serrano071

    Mac Pro 4.1 with Nvidia GTX 660 not flashed and want to update software from 4.1 to 5.1

    Hi, I have a Mac Pro 4.1 early 2009 with a Graphic Card Nvidia GTX 660 2GB not flashed, so I don´t see the boot screen and I don´t have the original card. My question is, I have the 4.1 software and I want to update to 5.1 software, can I do without the original card? Mac Pro 4.1 (early 2009)...
    • serrano071
    • Thread
    • efi boot gtx 660 mac mac pro 09 mac pro 4.1 nvidia update older imac update software
    • Replies: 2
    • Forum: Mac Pro
  18. basilt

    Pro 1.1 EFI vs FCP7 vs FCPX and BMD card

    hello, i just bought a used mac pro 1.1 Xeon 2.66ghz with 8GB ram and video card supplied by apple (geforce 7300). OSX Lion 10.7 I know it has EFI 32 bit that can be upgraded to 64bit. I admit i still cannot understand what the 32b vs 64b boot can offer though. I have also a PPC G5 2Ghz with...
    • basilt
    • Thread
    • black magic design bmd efi boot mac pro mac pro 1.1 ppc
    • Replies: 111
    • Forum: Mac Pro
  19. SeanLMH

    How to install OSX El Capitan on a Mac running Windows

    Okay, so my relative wanted to wipe an old Macbook Pro so that my Dad could use it, but said relative forgot to reinstall the OS. So, after much frustration, I have managed to get Windows running on the Macbook Pro (since I had an Installation Disk sitting around, I had to delete all the...
  20. I

    How can I create Windows install media that boots & installs UEFI ONLY?

    I'm trying to install Windows 8.1 in UEFI mode on my Mac Pro 4,1 flashed to 5,1 with 3.46GHz Intel W3690. As far as I can tell, Windows will only create media that boots the way the box that creates the media is booted. If the box booted via BIOS/CSM, the media it creates will (only) install...
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