Macbook switch efi and bios boot

Hi guys.
First of all, thank you for the nice installation-tutorials, but i got stuck at this point.
my situation is:
I have successfully installed arch with kde on my MacBook 8,2.
After some tweeking i got grub booting arch with efi, but i had to add these parameter: "radeon.modeset=0 i915.modeset=0"
It works pretty well, but i cant access the AMD graphic card, because i need to boot over bios, and thats my question...
How do i boot into bios? do i have to update the grub config? I have no idea how to handle this.
I hope that someone can help me.
cheers
Moesi

You can't "boot GRUB to BIOS" per se. Any given build of GRUB is either EFI and therefore supports EFI-mode booting or is BIOS and therefore supports BIOS-mode booting. Thus, to boot in BIOS/CSM/legacy mode, you must install the BIOS version of GRUB. On a Mac, you must also create a hybrid MBR. You'll also have to have a boot manager that supports switching boot modes. The Apple's EFI can do this when you hold down Option/Alt on boot, or you can install rEFInd (or the earlier rEFIt, but it's not been updated in years).
Overall, if you can get your video working in an EFI-mode boot, that's the superior option. A BIOS-mode boot of a Mac just involves too many ugly hacks that are likely to come back to haunt you in the future.

Similar Messages

Did a clean install 10.9.4. on a stock Fusion HD. When I run "diskutil list" via Terminal, everything is wrong. I have "EFI" and "apple Boot Boot OSX in every dev/disk** How do I fix? Any help would be much appreciated, thank you

Did a clean install 10.9.4. on a Apple Stock 1TB Fusion Hard Drive. When I run "diskutil list" via Terminal, everything is wrong. I have "EFI" and "apple Boot Boot OSX" in every dev/disk** Everything is out of place, How can I repair? Im willing too reformat if need be, however thats what I did in the first place. Any help would be much appreciated, thank you.
I know this cannot be correct
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *121.3 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:          Apple_CoreStorage                         121.0 GB   disk0s2
   3:                 Apple_Boot Boot OS X               134.2 MB   disk0s3
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk1
   1:                        EFI EFI                     209.7 MB   disk1s1
   2:          Apple_CoreStorage                         999.3 GB   disk1s2
   3:                 Apple_Boot Boot OS X               650.0 MB   disk1s3
/dev/disk2
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS Fusion                 *1.1 TB     disk2
/dev/disk7
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                                                   *121.9 GB   disk7

It appears as if my startup disk has been reversed and not using the fusion ssd portion as it should. At least its now reversed as to what it used to be originally before. the 128gb ssd used to be on top. Is my mac booting fusion correctly? Thank you for responding as I was about to reformat.
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group C2619AFE-0EB5-4721-8C50-3F3DBA520D1B
    =========================================================
    Name:         fusion
    Status:       Online
    Size:         1120333979648 B (1.1 TB)
    Free Space:   114688 B (114.7 KB)
    |
    +-< Physical Volume 583AAEA9-E333-4A83-9BE3-E937396E9248
    |   ----------------------------------------------------
    |   Index:    0
    |   Disk:     disk0s2
    |   Status:   Online
    |   Size:     120988852224 B (121.0 GB)
    |
    +-< Physical Volume B0C1CB16-D46F-4387-A679-B55392BB7934
    |   ----------------------------------------------------
    |   Index:    1
    |   Disk:     disk1s2
    |   Status:   Online
    |   Size:     999345127424 B (999.3 GB)
    |
    +-> Logical Volume Family FB42B9F4-CB77-4162-831B-7DCB7816E760
        Encryption Status:       Unlocked
        Encryption Type:         None
        Conversion Status:       NoConversion
        Conversion Direction:    -none-
        Has Encrypted Extents:   No
        Fully Secure:            No
        Passphrase Required:     No
        |
        +-> Logical Volume C0B8479B-C51C-45BF-B59B-1AA5DF3A3B83
            Disk:                  disk2
            Status:                Online
            Size (Total):          1111826497536 B (1.1 TB)
            Conversion Progress:   -none-
            Revertible:            No
            LV Name:               Fusion
            Volume Name:           Fusion
            Content Hint:          Apple_HFS
FoHeazys-Mac-mini:~ FoHeazy$ diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *121.3 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:          Apple_CoreStorage                         121.0 GB   disk0s2
   3:                 Apple_Boot Boot OS X               134.2 MB   disk0s3
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk1
   1:                        EFI EFI                     209.7 MB   disk1s1
   2:          Apple_CoreStorage                         999.3 GB   disk1s2
   3:                 Apple_Boot Boot OS X               650.0 MB   disk1s3
/dev/disk2
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS Fusion                 *1.1 TB     disk2

G41M-E43 and BIOS BOOT IMAGE

Does anyone know if this board can have it's BIOS BOOT image replced with a custom one?
What tool is used to do this?
I would like to change the image to something for my HTPC I am building....I know I can disable it. I want to put my own image on the BOOT screen.
Thanks,
*BH*

ThinkWiki says you have to work with them. I haven't come across a method to suppress them.
http://www.thinkwiki.org/wiki/How_to_change_the_BIOS_bootsplash_screen
I don't work for Lenovo. I'm a crazy volunteer!

Macbook 2010 froze and wont boot primary ssd

My macbook pro 2010 froze all of a sudden and i forced it to quit with the power button held. That shouldn't be anything exceptional. Now the computer does not boot to primary ssd or even notice it with cms pressed, from secondary windows hdd or from usb live linux. any suggestions? Ssd still has its warranty but there are valuable stuff in the ssd which I haven't been able to backup copy because of studying abroad.. Any ideas? I will be back home in a week for a while and will open the computer and trying to reattach the ssd if nothing else won't work.
I've tried pressing cmd alt p r, cms shift v and shift and just alt. Nothing seems to find the missing ssd. The computer sis not move, it sis not run out of battery, it shows only white screen after booting sound but after that nothing, and a bit,longer it finds the secondary windows hdd. the OS is Yosemite. Or was.. Just if I could recover the files..

Based on your comments, your HDD is dead. Get a new one, larger and faster if can afford it and swap in your MBP. You will have to reinstall your OS and I hope you have a back up of your data.
Caio.

Bought ram for Macbook 4,1 and wont boot up

Hey guys i just bought some new ram to upgrade my macbook 2.1 Ghz Intel Core 2 Duo running Snow Leopard 10.6.8 and it says its the right ram for it but it doesnt boot up. the RAM i bought is 2GB PC5300/667Mhz DDR2. i bought 2 modules to equal 4GB and it doesnt boot. i tried one stick, both sticks, one new and one old, still nothing. the disk drive runs but thats all. So either i got bad ram or they labled it wrong? What can i do besides return it?

If you bought your RAM at a place that also sells PC RAM you may have gotten mislabelled RAM. PCs can handle different RAM speeds so they’ll often label higher speed RAM as a lower speed rather than make two different speeds of RAM. But Macs are much more picky. They require a RAM stick to be exactly 667mhz not 675mhz or 800mhz. The way to tell is to put one of your old RAM sticks in and it will force the new RAM to run at the correct speed.
This is from one review of PNY RAM:
"These modules are actually 800Mhz. PNY no longer makes or sells 667Mhz modules. Not all computers that require 667Mhz are compatible with 2 800Mhz modules. They refuse to down clock properly. This is especially true with a number of Core 2 Duo MacBooks. Spoke to PNY support, they flat out told me that yes, they sell 800Mhz modules in 667Mhz packaging. If you RMA a module that is 667Mhz (or supposed to be 667Mhz) they will replace it with an 800Mhz module as they no longer have any 667Mhz SODIMMs, not even for RMA replacement!"
These are good online stores for Mac compatible RAM
OWC 667Mhz RAM
http://eshop.macsales.com/shop/memory/MacBook/DDR2/ - They offer Mac tested RAM at very good prices.
Crucial Memory http://www.crucial.com/ - good place to buy RAM from all over the world. They also have an excellent memory selector that allows you to choose memory based on your computer's model
Data Memory Systems http://www.datamemorysystems.com/apple-memory.asp - another good, cheap place to buying RAM if you live in the U.S.

Late 09 Macbook,3 beeps and no boot.

I have the newest Macbook and every now and then when I try to boot it I get 3 beeps (and the power light blinks with the beeps) and it will not boot. All I hear is the optical drive power up but thats it. If I wait a bit (about 60-120 seconds) and power it on it works fine. If I put it to sleep (close the lid) it works fine when I open it.
I did some reading and found that the beeps represent no working RAM. But the funny thing is, is that it will boot fine if I wait a little bit. Once I found that out I ran the Tech tool (the one that you get the with Apple Care warranty) and it tested the memory and came out just fine. I (being a PC technician) took off the bottom plate and reseated both memory modules, but the issue seems to return.
Any ideas? I will be close to an Apple store this weekend and I might be able to stop by, but I figured I would start here first.
Thanks
~Fletch

The same thing is happening to my latest model MacBook (non pro/air) too! except I hold the power button right away and turn it back on right away and it'll work.
What else I noticed is it hasn't happened since I help the power button down about another second. Until the light in the front is at full brightness.
I took it in the the genius bar since I've only had this macbook for 10 days.
They advised getting an exchange thru the retailer i bought it from (which is an online one, so i'm going to have to go some time with out my baby!) The Genius bar also said the 3 beeps could be from a failed logic board. Even though it turns on right after this may be an indication that something is wrong. So we'll see what happens from here.
And now it's not going to be easy to convince the retailer that this item is defective when I can't get it to beep when I want =/ The apple store couldn't even recreate the beeping. Seems to do it only when it's going through a cold boot (like off over night, turn on in the morning) and even that's not always a sure thing either!
Let's hope for the best =]

Macbook pro freezes and doesnt boot..

Hey guys, I have a MBP mid 2009 model running on OSX 10.7.5 with 4GB of RAM and 320GB of Toshiba Sata hard drive... my mac does freeze everynow and then leaving me no option than to shut down..because force quit itself freezes.. the weirdest thing is when starting up (after I restart my MBP when it freezes), MBP could not find my hard drive..so this folder with question marks appears.. then I have to open up my MBP pull out the hard drive, pull the sata plug out and put it back on and start my laptop..and it works fine again. I'm sick of opening my MBP can anyone help me with this.. can also any one tell me how just pulling out a cable is fixing my problem?
Thanks guys

I reset P RAm and its working fine now... hope it continues..

No wireless if switch is off on boot

My vaio laptop has a wireless kill switch, if it is switched off and then boot the system, there is no wireless detected even if I switch it on later, I noticed Opensuse 11 also has this problem, they both have kernel 2.6.25, however, Ubuntu Hardy (kernel 2.6.24) does not have this problem, I can switch the wireless on after boot and the system just detects and scans wireless network.

What megamixman says is right, that's how you need to automate the use of the kill switch. On my Vaio, the acpi event is given to my acpi handler script as:
arg $1 = sony/hotkey
arg $2 and arg $3 = I forget, it down't matter
arg $4 = 0000003c to mean radio was switched on, 0000003d to mean radio was switched off
But your hardware may be different. You'll need to log the events or something to see how your hardware is reporting the kill switch actions.
All that being said, though, I think the original poster may have had a different concern: maybe he's finding himself unable to even MANUALLY start up his wifi, if he boots with the radio switched off but subsequently switches it on. If he can't do it manually, then he can't script it either.
If this is the concern, then I suggest that maybe booting with the radio switched off results in your wifi driver not being loaded. So after you switch the radio on, you may have to manually do something like this:
sudo modprobe iwl3945
That's assuming you use sudo not su; and you should replace your own wifi driver for iwl3945. That's what I use on my Vaio, but perhaps you use iwl4965 or something else.
If that doesn't help, then sorry, I don't know what else to suggest. Other than always booting with the radio switched on. How often do you boot your laptop anyway?

Macbook Pro 7.1 (mid 2010), nvidia blob,efi and hybrid mbr,gpt

I've recently reinstalled archlinux on named machine, and I'm currently at a loss regarding the nvidia-blob.
I'm dualbooting osx and arch, have refind installed to the ESP partition, and boot linux using efistub.
Out of the box, using nouveau, this just works.
Sadly, nouveau doesn't handle the nvidia 320m chip all that well, so I have tearing
and most problematically my system gets really hot quite fast.
So I installed the blob, rebooted, only to find that X/the blob crashes on startup of X.
Hunting around, I now know, that officially, nvidia doesn't support 'pure efi mode' with their drivers. But that info is quite old.
I've also read contradictory claims of the blob working in similar circumstances...
What is the status of this as of 27.04.2013 ?? Anybody with the mbp 7.1 out there?
Now, I've had archlinux with the blob working on this machine before, at the time though I guess I was booting in bios or csm mode,
as I was using syslinux (which was started by refit/refind).
I can't use syslinux again, because I use xfs as my root fs, and syslinux doesn't support it.
Also, as far as I've been able to figure out, the use of syslinux requires an mbr.
Now DiskUtil from osx created a hybrid-mbr for me, because I used it to repartition my disk, but as neither osx nor linux require this,
I would most gladly revert this and have just the gpt on my disk.
So do I need an mbr for syslinux/grub-legacy/other options? for booting into bios/csm-mode?
I fail to understand how exactly this works with apple machines.
Are there other things I could try, kernel args maybe?
I just don't know what to try next, any help greatly appreciated.
Last edited by hungerfish (2015-05-02 11:33:31)

CSM-mode works.
Eve if the "pure-efi" way won't be solved by the nvidia developer in a foreseeable future, the CSM-mode works very fine and that's good.
This would solve this thread HALFway, not fully but in a reasonable way.
But the cause is as clear as daylight, the Apple EFI is way too old (version 1.x), and it's API is somewhat different from the UEFI of nowadays (version 2.x). I went around and asked some fellow students who also have a Linux installed in pure EFI and they stated it works with their UEFI board on various other Laptops or PCs, with nvidia.
It's frustrating, but somehow I can't blame nvidia alone for this, now I also blame Apple for it's incompatibility in their old EFI. Something like a firmware update is out of question I afraid.. (okay, Intel based Macs are using EFI, not the Open Firmware by Power based PC of Apple)
== Short Howto to CMS ==
So, if anyone is interested in the way I do or would do, here some descriptions,
First, I made my system just like the one of Ubuntu (before I know about a separated BIOS partition). Yeah, some of you would think "no, that's no good", but that makes no harm to me, since I won't change anything on it after the installation anymore.
Well then, I have an EFI partition with 200MB, an MacOS partition with approximately 70GB and the rest with Linux.
I assume you have already partitioned your harddisk as you wish. In my case I reinstalled Arch after the following step one. Maybe you don't want to sacrifice your Arch installation, then try the following:
1. Remove the link to the EFI partition in the fstab by deleting the line with the EFI partition.
2. Delete the arch-grub or grub folder inside the EFI folder on the EFI partition. (any way is fine)
3. Do the "Step one" (hybrid MBR)
4. uninstall the efi-grub and install bios-grub
5. Do the "Step two" without installing Arch (write GRUB into partition)
I THINK this should do the same, but I'm not sure.
Whatever you do, be sure to make a complete backup of your system before you do this steps, because I won't be responsible for the mess, if something is going wrong. The steps I'll describe did it for me.
Step one, to have a hybrid MBR partition, you should start the system with an arch cd or USB and make a hybrid table with gdisk
# gdisk /dev/sda
Follow this Wiki from gdisk and you'll obtain your hybrid mbr. Now I'm going into detail.
Type from one to three GPT partition numbers, separated by spaces, to be
added to the hybrid MBR, in sequence: 2 3
I choose 2 and 3, because 2 is my MacOS partition and 3 Linux. No need more. You can even just do 3, as srs5694 said, it's only for us to enable BIOS-mode booting on the particular partition.
Place EFI GPT (0xEE) partition first in MBR (good for GRUB)? (Y/N): y
Be sure to choose "yes", because if not, the EFI will be listed at last and the Macbook will have to search for it, which takes almost half a minute EVERY start.
Then it will ask you for every partition, which MBR code you want and if there should be a bootable flag to set. Choose the default MBR for all the partitions, but for the linux partition, set the bootflag with "y".
Unused partition space(s) found. Use one to protect more partitions? (Y/N):
Do as you want, I choosed "n" no, but that shouldn't be that relevant for a successful boot of the bios-grub.
After that, type "o" again to see, what it looks like, and with "w" you get a warning, if you really want to do this, which you actually want with "y".
With this, you should have a "clean" hybrid MBR.
Step two, now boot again with an Arch cd or USB.
If not already done this, follow the How do I install Arch on Mac? guide.
At the point of GRUB install boot files, you can choose between the way to install in on a separated BIOS-GRUB partition or on the linux partition. Of course it's not recommened, but it works, but well, do what you like.
For the chance you really want to install in into the partition as I did, don't be irritated by the error and warnings, as long as you can see this in the last line:
Installation finished. No error reported.
Then, even if it looks nasty, it's fine.
== Short Howto to nvidia and powersave stuffs ==
Well then, if you get here, then you did it (hopefully)!
You can start with installing your favourite Window Manager, mine was and still is XFCE. Pacman or Yaourt will ask you, which driver you want to install, like mesa, nvidia-304 or nvidia. Of course we choose nvidia.
Make sure you have the xorg-server and int utils installed, and xorg-server-devel, this prevents the "no screen found" error of nvidia.
Then it's done, your system should last about 30%-60% longer with batteries than with nouveau. I recommend you to stick with nvidia, because the nvidie-beta still drains too much batterie as I tested both of them.
For more power saving I suggest you have a look at Laptop, power saving.
For my part, I have powertop and the Laptop Mode Tools installed.
Since then, if I want to get the maximum power saving by reducing the brightness to one and let it idle for a while, I can see a consumption of ~7,4 W, that result for me in 6-7 hours batterie life. For normal work it'll last ~4 hours.
But it's important that the system won't heat up too much anymore. It's stays cool for the most time like now as I write this while listening to music and browse some website.
== Maybe some hints to correct errors ==
There are chances that GRUB won't find the /dev/sdaX by label or UUID, in this situation you have to redo the "hybrid MBR" step, then it should work again.
If this won't work, then you maybe did something wrong about fstab or the generating of grub.
Since I use nvidia (currently 313.something), the brightness steps to dim and lighten up is too wide. As we know the brightness do not rise in a linear manner, but it's exponential. That's the cause why the steps can be really large, if the brightness is near zero, but is small at almost full brightness. by the way, the power manager are making 10 steps for brightness.
The brightness panel doesn't work for me too, it'll crash if I want to add it to the xfce panel.
I had the problem, that 0 is too dark (obviously), but 10 is still to bright.
That's because there are still 8 steps betwee 0 and 10.
For this, just use xbacklight,
xbacklight -set <something between 1-100, 0 means black screen or just off>
For mor information, look for xbacklight, I made extra shortcuts, so that I can dim it in -+1 steps.
I heard, with xfce 4.12, this problem will be solved. So stay alert.
Hope this will help anyone out there and hopefully this doesn't miss the main topic of this thread (I afraid it does ^^")
Last edited by JohnWinkerbelt (2013-05-09 16:44:41)

My macbook pro fell and now it won't boot - superdrive issue?

Hi everyone,
I had a dreadful accident today. My macbook pro (mid 2007) model fell from the table; the lid opened up a little bit but thankfully the display wasn't damaged. The thing is that it won't boot; the screen remains black. The superdrive makes continuously this noise it does when the mac wakes from sleep or boots, and the boot process doesn't go any further. I have already reset its BIOS cache by removing the battery, but with no success.
Anyone familiar with this type of problem? Any chance it is coverable with applecare?
Thank you in advance,
-- ernani

It's hard to diagnose but you do have a problem. Take it to an Apple store or AASP and have them diagnose your damage. And, no AppleCare does not cover user accidents. Check with your homeowners insurance.

Win7 x64 booting natively via EFI (no bios emulation)?

Hi, has anyone got Win7 x64 booting natively via EFI without bios emulation or know of any resources elsewhere that discuss this? I understand it would have to be on an independent GUID partitioned HD... so not using bootcamp... ruling out all but Mac Pro's I suppose.
Any insights would be helpful.

Thanks... there are three kinds of Windows installs possible...
1. Using Bootcamp
2. Not using Bootcamp but still relying on BIOS emulation
3. Not using Bootcamp and not relying on BIOS emulation
The last one can only be accomplished with Win7 x64 or Vista SP1 x64 as they are apparently able to boot natively with EFI... no bios emulation required. However, they will obviously work as well with bios emulation.
As far as I kno Jowie's technique is to address #2... a Win 7 install without Bootcamp... but with BIOS emulation.
All Jowie has to say about #3 is at the end of his blog link...
"+Now I just need to verify if Vista SP1 is able to install on a GPT disk, as I'm still getting the error "Windows cannot be installed to this disk. The selected disk is of the GPT partition style." Looking at the following page leads me to believe that I should be able to:+
+Notable Changes in Windows Vista Service Pack 1+
+Adds support for new UEFI (Unified Extensible Firmware Interface) industry standard PC firmware for 64-bit systems with functional parity with legacy BIOS firmware, which allows Windows Vista SP1 to install to GPT format disks, boot and resume from hibernate using UEFI firmware.+
+At this point I'm able to delete and create partitions, but I am still getting that error. I'll have to dig into it further, but at this point I was happy to post about the resolution to the ability to boot from the DVD.+ "
I'm interested in finding out any resources or folks that have done #3.
BTW, I didn't mean to screw up your other thread, but there was nothing to indicate otherwise. It came up in a google search. You might want to make the title and/or first post clear about that.
Message was edited by: VirtualRain
Message was edited by: VirtualRain

Bios Switches A / B only boot when OC Genie button is on. MSI Z77 Military Grade

MSI Z77 Military Grade
1. Bios Switches A / B only boot when OC Genie button is on.
2. I normally use Bios B and upgraded the Bios from 17.6 to 17.12.
Flash was successful. I don't remember if I had the OC Genie button on or not.
But when I rebooted I couldn't get into the bios stuck at "A2" (thought I totally corrupted the bios
until I turned on the OC Genie from the motherboard.
However here is the quandary:
3. Neither A or B Bios will boot without the OC Genie button on.
4. The system will cycle twice than stop at A2
5. Eventually I would like to have both Bios-es working optimally.
Thanks for taking the time to read my post.

remove power cord from the PSU and do >>Clear CMOS Guide<<

Can I purchase Mountain Lion and make a flash drive bootable? I do not want to install it on my Macbook Pro. I have Snow Leopard on my Macbook Pro now, and due to my hard drive needing repair I need to boot off of another source, like my flash drive.

Can I purchase Mountain Lion and make a flash drive bootable? I do not want to install it on my Macbook Pro. I have Snow Leopard on my Macbook Pro now, and due to my hard drive needing repair, I need to boot off of another source, like my flash drive. I am in Paris and my Snow Leopard DVD is in Texas.

Mac OS X has a built-in disk diagnostic and repair program called fsck or file system consistency check. Here’s how to verify and repair your startup disk with fsck. As soon as you hear the startup tone, press and hold Command-S on the keyboard. Keep holding down those keys until you see a black screen with white lettering. This is called “booting into Single User Mode.” As the Mac boots in this mode, the screen reports each step of the process. The line should end in root#. Right after the root# prompt, enter the following: /sbin/fsck -fy
If repairing the disk in single user mode fails, it means one of two things. Either your hard drive itself is failing (a hardware failure), or the directory damage on your hard drive is beyond the capability of the built-in repair procedures in OS X.

Mid 2012 MacBook Air Yosemite Slow Booting and Old Boot Screen

Hello Guys,
I have a mid 2012 MacBook Air 13" and I had installed public beta of Yosemite on it. Now I am running OS X 10.10 (14A388b) and I have problems on the boot. On all the other macs, I saw that the booting screen is black background and a white Apple logo on it. But on my mac, the booting screen is same as Mavericks and for the first 5-6 seconds, the Apple logo doesn't show up. And the mac is booting very slowly. Also, Continuity and Handoff are not working properly. What might be the problem?

Hello Guys,
I have a mid 2012 MacBook Air 13" and I had installed public beta of Yosemite on it. Now I am running OS X 10.10 (14A388b) and I have problems on the boot. On all the other macs, I saw that the booting screen is black background and a white Apple logo on it. But on my mac, the booting screen is same as Mavericks and for the first 5-6 seconds, the Apple logo doesn't show up. And the mac is booting very slowly. Also, Continuity and Handoff are not working properly. What might be the problem?

Macbook Pro freezes at the boot up screen. Purple Pixels occur if I get through the boot up and freezes

My macbook doesn't want to boot up. I just get the apple with the rotating wheel that goes on for about 60 seconds. Then it either freezes or magically goes to the desktop. If it does get past the freezing spin wheel to the desktop, I have only a matter of time before these crazy purple pixels just flood about a nice portion of the screen. Once I see the random purple pixels there is nothing I can do to get rid of it, It just freezes and I have to shut it down with the power button. I got the computer in 2008 so I don't know if it's dying from old age or maybe it's a virus. Also, one time, I saw the flashing globe. It's really frustrating.

Powerbooks are not MacBooks and MacBook are not MacBook Pros. Look under the screen, what you have there is the machine you actually have. See if one of these programs applies:
http://support.apple.com/kb/TS2377
http://www.apple.com/support/macbook-bottomcase/
Run the hardware test here otherwise:
http://docs.info.apple.com/article.html?artnum=303081

Macbook switch efi and bios boot

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