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

learn more… | top users | synonyms

6
votes
1answer
937 views

Is there any way to manually bless firmware when main disk is external?

My iMac (mid 2010) keeps pestering me to upgrade my EFI firmware to 1.8. Sadly, no matter how many times I try to to upgrade the EFI (from the manual install, or the auto update), it does not seem to ...
3
votes
1answer
239 views

FreeBSD Install DVD corrupted my Mac OS X harddisk

Recently, I have tried a FreeBSD 7.4 i386 Install DVD, just to see some screens of FreeBSD on my Mac mini Intel 2006. I was going to see (to remember) just several dialog screen of and perhaps I would ...
1
vote
1answer
113 views

Boot menu not working

So basically I can't boot from my ssd anymore. It just shows a grey screen with an error symbol. I can't get into target disk mode and none of the other boot shortcuts seem to be working either. When ...
1
vote
0answers
1k views

rEFIt boot changed after update to Yosemite

I was using rEFIt to work with Ubuntu with my Mac. After the upgrade to Yosemite I had a problem with rEFIt. I found the following solution on ubuntuforums.org but rEFIt still didn't work: cd ...
1
vote
0answers
153 views

Hide “disk password” login option at EFI (Filevault) login screen

I encrypted my volume before installation and have added my user as FileVault user afterwards. Now I can login with either the disk password or my user login password at the EFI (Filevault) login ...
1
vote
0answers
392 views

Understanding firmware.scap

So, I recently acquired an old MacbookPro (v.5,4 mid 2009). I decided to create an Arch linux partition, and thus began my adventure... While installing rEFInd (the maintained fork of rEFIt), I ended ...
1
vote
0answers
40 views

How do I get my dual boot to behave correctly?

Once upon a time my Mac had only OS X on it, but at various points in history it contained different versions of OS X and several different Linux distributions and their boot menus. I also had rEFIt ...
1
vote
0answers
362 views

Corrupted hybrid GPT disk and possible fixes

I have a 17" Mac Book Pro (Late 2011) which have dual boot Windows 8.1 installation via Bootcamp along MacOSX. Prior to Mavericks upgrade I had this disk layout EFI Machintosh (~115 GB) Bootcamp ...
1
vote
0answers
175 views

Impossible install Mac OSX, probably firmware damaged

Yesterday evening I install update on my MacBook Unibody (Version 6,1; Late 2009). The update run on Mac OS X 10.8.5 consist in security update and new version of Safari and iTunes. The update is run ...
1
vote
0answers
447 views

Set EFI to boot Windows via (U)EFI one time

On my late 2012 Mac Mini, I have installed both Mac OS X Mavericks (with FileVault) and Windows 8.1 (natively, not via Bootcamp): /dev/disk0 #: TYPE NAME ...
1
vote
0answers
885 views

How to create linux USB discs that do work on Apple Macs?

It seems that there are several problems releated to incompatibilities between Apple-EFI and UEFI that do prevent Apple users from easily using USB drives to install or even run other operating ...
1
vote
0answers
419 views

How do I install Linux on a late 2012 mac mini?

I installed a 2nd hard drive in my late 2012 mac mini. This hard disk had Mint Linux - 12 on it (Installed when it was in a different computer). Pressing the Option showed me two additional hard disks ...
1
vote
0answers
377 views

Replacing OS X with Linux or Unix, and making the switch to Tiling Window Managers

I have a Macbook Pro 8,2 and really want to make the switch to something a little less stubborn and a little more flexible than the proprietary Mac OS X. I am a bit frustrated with MacPorts lately and ...
0
votes
0answers
201 views

What's a good graphics card for Yosemite on a Mac Pro 1,1?

I'd like to upgrade my Mac Pro 1,1 (using the EFI workaround hack) to run Yosemite so all my Macs are running the same version of OS X. This old box is only used as an HTPC, so smooth 1080P video ...
0
votes
0answers
143 views

Accidentally Removed EFI Partition

I removed the EFI partition accidentally but I have it on a Time machine backup. Is there a way to simply move it from my external drive to my boot drive. I've tried restoring the format of the ...
0
votes
0answers
109 views

Can't boot on OS X partition after resizing Windows partition

I initially had three bootable partitions: OS X Recovery for OS X Bootcamp (Windows 8) Now, on Windows, I decided to make my Windows partition smaller, reducing its size using the native Disk ...
0
votes
0answers
119 views

How to recover fully formatted EFI partition?

I have macbook 4,1. I tried to install on it ubuntu and fully formatted hard drive. So, there are any way to restore efi partition? (now all apple bootable cd display stop sign and do not work) I ...
0
votes
0answers
115 views

I need EFI Firmware and SMC for Macbook Late 2009 (6,1)

Like from title. I need to reinstall SMC and EFI Firmware for Macbook Unibody White Late 2009 (6,1), but I don't find the EFI and SMC for my model on Apple Support page. Where can I find them ?
0
votes
0answers
275 views

Efi Boot appears on BootCamp page

I'm new in this forum and I hope someone has an answer for my issue. Since yesterday my mac-book pro won't boot in Os X I have boot-camp on it If I turn on normally the apple logo, loading circle ...
0
votes
0answers
165 views

Mid-2012 Macbook Air, boot directly from MBR not from GPT

Ok, I have an end-goal of using rEFInd, windows, and linux installed on my macbook air. (info here: http://support.apple.com/kb/SP670 ) Windows cannot be installed onto a GPT partition, so I'll have ...
0
votes
0answers
611 views

Repeated Kernel Panics & Freezing on Late 2012 Mac Mini 6,1. Help please with the Log

I've had massive problems with my Mac Mini recently. It has been freezing and rebooting after around 10 to 50 minutes use. It's a Late 2012 Mac Mini 6,1 with 8gb of memory. The problems got worse ...