Extensible Firmware Interface is a specification that defines a software interface between an operating system and platform firmware

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2010 iMac with new firmware IM112.0057.03B (2015-002) can't install windows 7-10 anymore

So I've been installing and uninstalling windows 7 and windows 10 since it came out on my iMac for a long time! My iMac does not have a dvd drive because I took it out. I've been installing windows 7 ...
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3answers
71 views

Permanently set Startup Disk to Windows without Boot Camp utility?

I have a 2011 Mac mini that I have completely removed OS X from and installed Windows 10 instead. Since Boot Camp only supports Windows 7 for this Mac, I did not use it. I just formatted the drive, ...
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1answer
15 views

How can I check if a new hard disk is detected by Mac EFI at boot?

I have a Mac Mini (late 2012) and have added a new hard disk drive in it. But Mac OS 10.10.5 is unable to detect it. If this were a PC, I'd check the BIOS to see if it was detected and listed there, ...
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2answers
50 views

Triple booting a modern Macbook (early 2015) with Bootcamp in EFI mode

So I need to have Windows 10, Linux and OSX on my Macbook pro early 2015 along with a shared data partition. There are several articles on the internet that say Boot Camp only works in so called "...
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19 views

How to fix Toshiba external hard drive with missing EFi system partition?

I plugged my sister's Toshiba hard drive into our TV. After I unplugged it and plugged in back to our computer it says that the disk cannot be read so I tried to repair it using the Disk Utility on ...
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15 views

Macbook Pro EFI Edit

I have Linux installed on a Macbook Pro 5.1 (2009). The Linux kernel starts up with the Performance CPU Governor, which causes the CPU to get hot. Linux will drive the CPU at 3.06 GHz, but Apple ...
0
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1answer
55 views

Grub on Mac via EFI (Linux: /dev/sda1 Darwin: /dev/disk0s1) (MacBook Pro Early 2011 if it matters)

I installed Debian Jessie 8.5 on my MacBook Pro over my old Bootcamp partition (Windows 8.1). I deleted the bootcamp partition with the partition manager in the Debian Installer and created two new ...
3
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1answer
228 views

Installing Ubuntu 16.04 server on Mac Mini 2006

I have liberated an old 2006 Mac Mini (Model: A1176) from being thrown away and wanted to use it as a Time Capsule for my other Macs. To do this, I want to install Ubuntu server 16.04 LTS to roll my ...
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29 views

Can't access External Drive (time machine), no EFI partition system. How to manually rewrite it?

tried to back up my Mac to time machine yesterday but I couldn't mount the drive. I have a Lacie 3TD hdd that is partition into msdos(for transfer between pc and mac) and hfs(time machine). I am able ...
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18 views

How can I boot a WinPE USB on a Macbook? [duplicate]

I have a 2008 Macbook Pro with OS X Yosemite and Windows 7 on a bootcamp partition. Yesterday while trying to create another partition (in windows) I accidently converted my basic disk of primary ...
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1answer
205 views

EFI Boot Windows 8.1 or 10 Install on MacPro4,1 / Mac Pro (Early 2009)

I would like to install Windows 8.1 or 10 on a separate single SSD disk in my MacPro4,1 (not yet flashed to MacPro5,1) using only EFI/GPT method. The machine has a 64Bit EFI (rEFIt reports version 1....
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2answers
152 views

How can I install Fedora Linux on a MacBook Pro, Model A1150?

I performed the following steps: Formatted a USB Flash Drive as: FAT32 Copied the Fedora Live ISO image to: /efi/boot/boot.iso Copied ISO 2 USB EFI Booter for Mac to: /efi/boot/boot.efi I then ...
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0answers
70 views

Boot Windows from USB with EFI password

I've created an USB with Windows 10 from where I can boot: Restart pressing option. Select USB EFI partition. Windows starts. When EFI password is active it will be asked when booting pressing the ...
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29 views

Mac OSX EFI problems, urgent help needed!

So, I recently did an update on OSX, booted my computer up and I discovered that I the update replaced my EFI boot rom and the SMC with the incorrect SMC, so now I can't use my battery and the ...
0
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1answer
242 views

How do I install Windows on separate disk using GPT/EFI and BootCamp?

I have a Late 2012 27 inches iMac with an internal HDD (that has a Macintosh HD partition, an EFI partition and a Recovery partition) and an SSD. I installed Windows 10 on using BootCamp Assistant; ...
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54 views

Why do we need /usr/standalone/i386/Firmware.scap file?

I am sorry for bad english - this is computer translation. Continuing the theme begun in the here and the here There Giuseppe9000 wrote: The file is needed in the boot process I renamed the ...
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1answer
441 views

Mysterious “EFI Boot” partition appearing at startup?

A few days ago, I tried installing Windows 8.1 on my late 2011 Mac by using disk utility to make a free space on my disk and a Windows 8.1 boot drive to install. While installing, my Mac recognized ...
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43 views

firmwaresyncd - ESP Firmware.scap - /usr/standalone/i386/Firmware.scap

Please explain why /Volumes/EFI/EFI/APPLE/EXTENSIONS/Firmware.scap is overwritten every time you boot (as indicated below) though the file is not used while booting? host:~ user$ man 8 firmwaresyncd ....
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1answer
247 views

Installing El Capitan from a bootable DVD

I have El Capitan on a bootable DVD. I restart my Mac and hold the option key until the disks come up and I choose EFI Boot (name of the disk is different than what it shows at the time of booting). ...
0
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1answer
91 views

/Volumes/EFI - Firmware.scap & MBA41_0077_B12_LOCKED.scap

Sorry for bad english - this is computer translation. See figure - MBA41_0077_B12_LOCKED.scap (# 2) - is the actual firmware of my MacBookAir4,1, which is was used to update firmware, but that such ...
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3answers
81 views

Swapping HDDs w/ Different OSX Versions, Possible?

My situation: I have a "late '08 aluminum" Intel 64-bit MacBook, still have Snow Leopard installed, and XP via Bootcamp, all on the original hard-drive. Yes, it's my "legacy" setup. The HD is 7 years ...
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1answer
30 views

File types in EFI partition

In El Capitan, I mounted the EFI partition using sudo diskutil mount /dev/disk0s1 and instead of finding apps that I can run, I found .scap, .smc, .epm, and .efi files. What are these? The reason I ...
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1answer
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How do I restore my missing partition and install Windows 7 64-bit?

I previously had a Windows 7 32-bit installed on my Mac using Boot Camp Assistant. I recently upgraded it to Windows 10 (followed Microsoft update message), but later after I saw some drivers are ...
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41 views

Does my stuck shift key affect the proper boot of my installation mediums?

I have a late-2009 unibody Macbook Pro. My left shift is stuck for ages and I have been avoiding this problem by pressing some other keys during boot to avoid safe mode and by using Karabiner to remap ...
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46 views

Create EFI partition on external HDD for rEFInd

How can I install Ubuntu and Windows onto my external HDD which already has OS X installed on it? I want to install it using rEFInd boot manager. If I can create an EFI partition for my drive then I ...
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3answers
3k views

How can I install the newest EFI firmware upgrade from El Capitan?

I've got an early 2011 MacBook Pro (8,1) and I am trying to install the newest EFI firmware upgrade, however it only supports 10.8.5 and 10.9.5. Unfortunately I have no clue as to what the best ...
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1answer
1k views

How to fix broken GPT, GUID and unmountable, no type volumes?

I have a Macbook Pro with retina, Yosemite and 500GB hard drive. I tried to install Windows using Bootcamp and accidentally deleted a partition, now my Mac cannot boot anymore. This is the output from ...
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57 views

Issue with OS X Startup Disk in System Preferences when using EFI dual boot

I have Windows booting EFI on my Mac mini (Late 2012). It has two physical drives with one EFI partition (on the OS X disk). If I option boot I see OS X and EFI (Windows) choices and everything works ...
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1answer
102 views

EFI automounts on startup

After upgrading to the newest El Capitan from 10.10. to 10.11.1 - I guess - the normally invisible EFI partition appears on the desktop as a regular volume on different machines, if I choose to show ...
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15" MacBook Pro (2011) i7, 16GB ram, 1TB hybrid drive. EFI problem [duplicate]

Have been running in Win7 for awhile and needed to boot into Mac El Capitan. Option had my normal icons but my Mac partition now is labeled EFI Boot. Other icons are my Windows partition and Recovery ...
0
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1answer
601 views

GRUB 2 - “fb: swiutching to radeondrmfb from EFI VGA”

Whenever I try to boot Arch, Mint or Debian from a USB stick using GRUB 2 on my mac with compatibility mode, it freezes on this error (given in the question title). I've tried every available, up to ...
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2answers
2k views

Applying an old EFI update on a new version of OSX

I have El Capitan running on a MacMini 2010 that I use as a media player/server. The computer used to be my mother's and I have just noticed that she has never applied any of the firmware updates ...
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310 views

Mac Pro, Boot into OSX without EFI after Bootcamp

I have a Mac Pro, early 2008. I installed Windows 10 using bootcamp. The mac came with an 8800gt, but I had a GTX680 from my other PC which I put in the mac, it is not the mac version so I don't get ...
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2answers
549 views

How can the average user easily validate the integrity of their Mac's firmware?

How can the average user easily validate the integrity of their Mac's firmware? Before you downvote this question or lecture me on how I am paranoid and no one should ever need to do that, please ...
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591 views

What is /Volumes/firmwaresyncd?

I keep seeing this in my logs: > 10/5/15 3:45:16.532 AM deleted[366]: normalizeUserMountpoint:738 > volRoot failed for /Volumes/firmwaresyncd.G3PNKw What is it? Is it related to the firmware ...
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514 views

How to use Testdisk under OS X recovery mode?

I accidentally broke the GUID, I suppose, when I was trying to solve the incorrect EFI partition problem. What I have now is: Disk1 is a 4 GB thumb drive with a recovery partition (disk1s2) I ...
0
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1answer
762 views

How to change the GPT partition type of an EFI partition?

I have a perplexing problem with the EFI partition on my boot SSD. The GPT partition type is "Microsoft Basic Data". On all other drives in my system, including my Carbon Copy Cloner clone of my boot ...
0
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1answer
147 views

Boot from external USB3

I've recently bought an usb3 flash drive where I've put a live kali linux distribution. When I try to boot my early 2015 mac book pro (with Yosemite) from this usb3 drive I have two options: windows ...
0
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2answers
868 views

Getting my MacBook Air (2011) into Windows faster

Is there a way to reduce the time spent in EFI? It seems more than 15 seconds that the Mac (Macbook air 2011) stays with the screen grey before beginning to boot (or resume from hibernate) to Windows....
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273 views

HFS+ external drive missing EFI, will not mount on Mac

First off: Fear not, I have everything from this drive backed up. I'm just trying to reformat it, but I had someone else attempt it on Windows which doesn't look like it helped. I'm a novice but ...
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1answer
624 views

Efibootmgr command for OS X

I have successfully been able to install Linux Mint on my Mac. The only issue is I cannot select the boot partition holding option. To fix it I booted into linux and ran sudo efibootmgr -o 1,80. This ...
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1answer
111 views

Resizing system partition

When I installed OSX Mavericks, I left free space after my system partition in case I wanted to install a second OS there. This has proved unnecessary — I've never modified the partition table — and ...
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163 views

Corrupt EFI Partition or Error b/c of Encryption? & Ghost Partition

I have a 2012 Mac Mini Server with two internal SSDs. Until recently, I had Mt. Lion installed on one of the SSDs, as my only boot drive, and used the other, rarely, for file storage. I created a ...
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2answers
1k views

Unable to use gpt to restore efi partition

I accidentally deleted my efi partition, which I now know is bad news bears. I found a guide here to restore it without losing data, but even though I'm booting from usb and have unmounted all ...
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3answers
120 views

Is my UEFI bugged?

I just received the new MacBook Pro 15" (with basic configuration). When I press 'Alt.' during the booting process, I don't see the recovery partition. Also, the interface is not gray as it used to ...
0
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1answer
704 views

How can I get Windows to install in Legacy (BIOS) boot on my mid-2012 MBP

I've got a 13" mid-2012 MBP running OS X 10.10.3 Yosemite. I've recently repaved it with a fresh install and now I'm getting round to Bootcamp`ing it. I've installed Windows 8.1 in EFI boot mode and ...
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1answer
582 views

Why does my Mac Pro boot to black screen with third-party video card when holding Option key?

I have a Mac Pro 2012, and recently installed a new Gigabyte GTX 760 graphics/video card. I also have Windows 7 installed on this computer on my Bootcamp partition. When I attempt to start up my ...
2
votes
2answers
5k views

Any solution to bootcamp windows 8.1 with macbook pro 15" 2010?

This question may at first glance seem to be a duplicate but I am asking for an update and clarification to an unsolved problem. After extensively scanning the web, it seems that the consensus is ...
2
votes
1answer
365 views

What is the difference between HFS+ and EFI System Partition (ESP)?

I'm familiar with manually installing certain files. In this case, I am installing rEFInd Boot Manager, see http://www.rodsbooks.com/refind/installing.html Yet when manually installing software on ...
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2answers
510 views

How can I repair EFI?

The computer is a MacBook Air. I have OSX Yosemite and Linux Ubuntu 14.04 dual boot. I messed up and damaged my Mac EFI and hence OSX ceased to work. Recovery disk was destoyed too. FileVault is on ...