IMac 2012 Slooooow Boot when USB atached

Hello Comunnity,
I am using a Imac late 2012 2,9 GHz Intel Core i5. It runs latest Mavericks update 10.9.1 with a 1,1TB Fusion drive
Since installed mavericks in the machine, when booting it lasts more than 1 minute. If i took off all USB connected devices, and after making a secure mode reboot, it lasts about 25 secs. If connect any usb again, then 60+ seconds booting.
I already tried a Mavericks clean install, and recovered my stuff from a time machine copy, and the first reboots were ok, booting in 25 seconds (more or less), but later on came back to "abnormal" more than 60 second booting.
Any clues what may be the problem?
would really apreciatte, Thanks in advance for any help

Hello mcfraga2
Start your troubleshooting with resetting your NVRAM on your iMac. Your iMac may be trying to boot to your external and then reverting to your internal drive after it realizes that it cannot boot to it.
About NVRAM and PRAM
http://support.apple.com/kb/ht1379
Resetting NVRAM / PRAM
Shut down your Mac.
Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.
Regards,
-Norm G.

Similar Messages

Imac won't boot when usb plugged in

Hi all,
I have a probleme since i got my Imac 27 Mid 2010. It just dont boot when a usb Drive is plugged in. I had i Firewire hard drive in the past and i had no problems to boot up on it. Turn the mac on, holding option key and bang ! BUT usb just dont work, it stay on gray screen and after a while (10 mins) it boot on my regular internal drive.
I tried several usb drives and it's always the same. It look's that im not the only one that have this problem. I bought this fantastic Machine but i cant make a rescue clone and that driving me crazy !! I think my situation is not ''NORMAL''
Thank's all

SMC RESET
http://support.apple.com/kb/HT3964
Shut down the computer.
Unplug the computer's power cord and ALL peripherals.
Wait 15 seconds.
Attach the computers power cable.
Wait another 5 seconds and press the power button to turn on the computer.
(this reset depends on the 5 second timing for it to work)
PRAM RESET
Zap the PRAM
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

IMAC won't boot with USB card reader attached

My quite new 24" iMAC won't boot if I have a USB card reader attached:
I get to the white screen with the apple logo, but it gets stuck there and the little spinning gear below the apple logo never appears (I've waited several minutes). (In all my test cases, there is no card in the card reader.)
I've tried two different card readers with the same results ("iDOTconnect" brand and a brand new Apacer unit, both are USB2.0 multi-format card readers).
The 1st one I tried via a USB hub, the second one I tried via a new hub and also directly connected to the mac (both of those hubs work fine).
Anyone have any ideas?
Regards,
Strathglass
Message was edited by: strathglass

Hello strathglass
The same thing can also happen with other connected devices such as external HD's and iPods, the Startup Manager is lost and searching for a boot volume.
1. You may be able to fix it by going to: *System Preference / Startup Disk* and select the *Mac OS X 10.5.5 on Macintosh HD* then *Click the lock to prevent further changes.*
2. Leave those devices that cause boot issues disconnected until the iMac is up and running!
3. Only sleep the iMac, and be sure to disconnect those devices be for shutting down or updates that require a restart!
As a habit, I have always ejected and disconnected all mounted USB devices (flash driver, iPods, cameras, card reader, etc.) from my hub be for sleeping, restarting or shutting down...
Dennis

PC wont boot when USB-TC01 plugged in

Why will my PC not boot when the USB-TC01 is plugged in?? I have adjusted everything in BIOS to make sure I am not trying to boot from USB nor CD/DVD drives. Other than that, the device works fine once the PC boots. I tried using a self powered USB. I am using XP, Pentium D, 3.2GHz, w/ 2BG RAM. Any help?
Thanks.

Hi,
I have a few questions to gain a little more insight into what is happening:
1. Have you tried booting up with other USB devices connected? If so, does it boot up correctly?
2. Have you tried this on all available USB ports? If so, does it cause the same behavior?
3. Does the USB-TC01 cause other computers to act this way when connected?
Best regards,
Justin Petry
Justin
National Instruments
Product Support Engineer - Conditioned Measurements

2012 mac mini does not boot when usb 3 drive is connected

I have a late 2012 Mac Mini, Ivy Bridge, that has a USB 3.0 external hard drive connected to it. If the hard drive is powered on when I power up the Mac Mini, I get a light grey screen, but never see the Apple logo and the system just sists there. If I boot the Mac Mini with the USB 3.0 drive connected, but powered off, the Mac Mini boots just fine. Interestingly enough, if I reboot the Mac Mini with the USB 3.0 hard drive attached, the Mac Mini boots normally. I have installed all of the OS patches I can find and have not had any luck in resolving this. Does anyone have an idea what might be going on?

Something to check. Power everything down. Turn on
your external drives then do a PRAM zap booting the MIni.
http://support.apple.com/kb/PH11243
It may or may not help.
If it doesn't, then check the system log starting from the time
you start up the Mini and see what the last entry was. Wait a fair
amount of time so a gap in time in the log can be seen when you turn
the drive off. Could determine if it is some hardware issue, as BDAqua
was suggesting, or a driver issue.

Intel imac won't boot with usb powered hub attached

My intel imac has started to not boot with a powered (have tried a variety of them) attached. Just stops at the white screen. Also, after I attach the hubs (2, both powered) the computer got into spurts when it just kicks everything attached to the hubs off saying that something pulled too much power. At other times it is fine with the same set up. I've tried resetting the PRam but it didn't make any difference.
I see from other postings that this isn't too uncommon, but didn't see any fix.
Thanks

Can you determine if it is just one of the hubs? Resetting the PRAM probably didn't have anything to do with this problem but the SMC controls the power, try this reset:
SMC RESET
http://support.apple.com/kb/HT3964
Shut down the computer.
Unplug the computer's power cord and ALL peripherals.
Wait 15 seconds.
Attach the computers power cable.
Wait another 5 seconds and press the power button to turn on the computer.
The 5 second timing is important to a successful reset.

IMac Won't Boot With USB Keyboard Connected

We have a suite of 10 iMacs (10,1 - 21.5 inch), but one of them will not boot and has issues coming out of sleep while a USB keyboard is plugged in.
Have tried swapping the keyboard with another iMac - the other iMac still boots but the problem iMac continues to play up.
Tried plugging the mouse into the iMac's USB instead of the keyboard's.
Tried SMC reset, PRAM reset.
Re - imaged the machine from a time machine backup of one of the other iMacs, which made the issue go away for about a month... but then it returned.
Using a magic keyboard is fine as a workaround, but the users need the number pad, and if possible I'd rather fix the issue than buy a clunky separate keypad.
Does anyone have any ideas? Any help would be very appreciated!

Hello strathglass
The same thing can also happen with other connected devices such as external HD's and iPods, the Startup Manager is lost and searching for a boot volume.
1. You may be able to fix it by going to: *System Preference / Startup Disk* and select the *Mac OS X 10.5.5 on Macintosh HD* then *Click the lock to prevent further changes.*
2. Leave those devices that cause boot issues disconnected until the iMac is up and running!
3. Only sleep the iMac, and be sure to disconnect those devices be for shutting down or updates that require a restart!
As a habit, I have always ejected and disconnected all mounted USB devices (flash driver, iPods, cameras, card reader, etc.) from my hub be for sleeping, restarting or shutting down...
Dennis

IMac won't boot when warm(?)

Here's the symptoms of my 20" iMac G5 (ALS), 2.0 GHz, bought 14 months ago (and no, the S/N is not listed in the repair program).
This is what I get 98% of the time when restarting, no external devices connected:
- some quiet fans start, hard drive gives a couple of soft rustles
- no chime
- optical drive doesn't give its usual start-up crunch
- power light turns on if its the first boot attempt after replugging, otherwise not
- screen remains black
- caps lock light doesnt toggle
- any key combinations pressed during startup dont work
- after 1 min 3 sec, fans rev up
..and thats how it stays for at least 16 hours.
My guess is this has something to do with heat, because the only times it successfully boots up are when it's been turned off for an hour or more. And even then it might take several tries.
The CPU is at around 67C when idling and near 90C when loaded, but I've never had any crashing problems, in fact the only time I reboot is because of security updates every month or so.
So is this a logic board problem too?
20" iMac G5 (ALS), 2.0 GHz Mac OS X (10.4.7)
20" iMac G5 (ALS), 2.0 GHz Mac OS X (10.4.7)

Welcome, nsirola
your description sounds familiar to me... no, it is not exactly the same, but some elements are similar.
i guess it could be caused by a few different things:
a) software scrumbled;
b) power supply;
c) logic board.
first of all, safe all files which you need -- if you can! if not, get help from apple service, I think they can make a copy of the hd. also, you can try to boot your iMac in target mode and read off the files through another mac (or pc).
really, this is important.
then, it looks to me as if it is a powersupply problem or lb problem, which can only be handled by Apple. but before going to service, i would try to do an "Archive and Install" of your system. This should reinstall the software in a good state. Even better, if you do "ERASE and Install" then everything is wiped out from you computer, and it comes (softwarewise spoken) to its "native" state. Beware, you will loose all your files when doing "ERASE and Install"!!!
if this doesn't help, i would contact Apple. I had recently 2 months of trouble and my iMac got repaired twice, each time they exchanged the logic board. They did this without charge, inspite of the fact that my machine was 1.5 years old, and not in the batches of S.N. which are recognized by Apple as problematic.
If you have difficulties, discuss with Apple Service directly - they want to keep customers, and they know that they have produced not only apples, but also some rotten lemons...
Please, post back!
Success, thomas

Bootcamp woes, unable to boot from USB and DVD drive reads all DVDs blank

My partner and I are completely unable to install Windows using Bootcamp. We have tried dozens of solutions on the internet.
2011 iMac (purchased in by me and my partner 2012) reads all DVDs as blank. We have (hilariously) another Mac, an MBP, that has the same exact problem. You'd almost think "Superdrives" eventually just stop working or something. So obviously we can't install Bootcamp on the iMac using a DVD.
But what about a USB stick? Well after modifying the plist file and writing a bootable Windows USB and trying to boot from that, we were greeted with the mysterious and apparently yet-unsolved "no bootable device" error.
So our iMac can't boot from USB drives or read DVDs. We've only owned it for two years. And this is the second Mac we've owned where the Superdrive has died. And we don't even use DVDs more than like once a year.
But anyway, can someone tell me what we're supposed to do if we want to install Windows aside from throwing money away to buy another Superdrive that is probably going to die again in a year? Maybe a way to make our mac boot from our USB stick? Something?
Thanks.

Should you have another drive with a MBR, use it to rule that issue out. Alternatively create a GPT on the flash drive and try to boot from it.
What options are there for the usb controller/boot priorities/order/options? Does the laptop recognize the usb flash when already in bios setup? Should there be any form of choosing the device to boot, use that with the flash drive in the socket, then switch it with the external drive.

IMac will not boot up when printer is plugged in USB

After buying my new iMac (with Tiger) I successfully transfered everything from my old iMac (with Panther) and all was well.
The problem is that when my printer (Canon Pixma MP130) is plugged in on start up, the iMac will not boot up (no gears turning on the white/grey screen). When I unplug the printer from the USB and start it up, it works fine. Its not a super big deal because I can just plug the printer in when I need it. But why does it do this?
I foound on the internet someone else who had the same issues. It was suggested to him to search the printer manufacturers website for updated drivers. I did this, installed them etc..... still no luck.
I am without any mac guru's here in Yellowknife......help!
Angie

Hello there,
I hope it is OK to recycle this old thread.  I did not want to create a new one since I am experiencing the exact same issue as the original poster *flying girl* as well as other posters in the following threads:
http://discussions.apple.com/thread.jspa?messageID=4190807
http://discussions.apple.com/thread.jspa?messageID=3950255
http://discussions.apple.com/thread.jspa?messageID=4201169
http://discussions.apple.com/thread.jspa?messageID=4490899&#4490899
http://discussions.apple.com/thread.jspa?messageID=4470944
I have two Macs, a PowerBook G4 and an Intel iMac 20" (Aluminum)--please refer to my signature or profile for the specs of these machines.  Of course, I got the PowerBook before I got the iMac.  I am running the latest version of the Canon MP130 drivers, printer drivers version 4.8.3 and scanner drivers version 12.11.0, on both machines.
When I turn on my PowerBook with the Canon PIXMA MP130 multifunction turned ON and connected via USB to the PowerBook, the PowerBook boots up just fine.  I have even experimented with both a USB hub and a direct connection to the Canon MP130, and the PowerBook boots fine in both instances.
However, when I turn on my iMac with the Canon MP130 turned ON and connected via USB to the iMac, the startup tone plays, and then the iMac hangs at the blue/gray solid screen--it does not even show the Apple logo or the spokes--that is, until I turn the Canon MP130 OFF.  When I turn it off, the Apple logo appears, the spokes move, and my iMac boots up just fine.  And as long as the MP130 is OFF, I can boot the iMac fine from scratch too.
I tried starting in verbose mode (⌘V) and single-user mode (⌘S), and the gray/blue screen still appears after the startup tone plays; again, if I turn the Canon MP130 OFF, the rest of the boot sequence resumes as normal, and only then do I get to see the descriptive text for those startup modes.  But the text goes by so fast that I miss most of it--I did manage to catch something that said something like "get full config descriptor = NULL," but I am not sure if that was the exact wording.  I would need a good camcorder or even just a digital camera or another device to capture exactly what the screen says in verbose mode.  If I had those options, I would post pictures here.
I was thinking about contacting Canon, but since the issue happens on one Mac only, I figured they would tell me that it is a problem with my Mac.  So hopefully posting the information here is OK.
Another key feature is that the Canon MP130 has a built-in card reader.  I made sure that my Startup Disk preferences were set to boot from the system drive, and they still are.  And I have reset the SMC and PRAM on the iMac.
I would like to mention the following link:
http://www.ehmac.ca/anything-mac/50389-intel-imac-wont-boot-when-canon-printer-p lugged.html
If you go to page 2 on that above thread, it shows one user who allegedly physically disconnected the card reader connection from the inside of the Canon MP130 (I would NOT recommend that myself).  I just wonder if there is a more feasible resolution to this issue.
Does anyone else experience the same issue with other printers or multifunctions?  Also, why does the issue occur only on my Intel iMac 20" (aluminum), and NOT on my PowerBook G4?
Please let us know about your experience as it seems many of us are at a loss for a solution.
Thank you very much for your help; we await!  :)
Cya!
\m/ Mad Metal Mage \m/

I Baught A iMac 2010 From Someone it came with lion but for the programs i use i need snow leopard but when trying to install it won't boot from usb or cd what can be the problem i've been at this for over 24 hours if anyone ca help it'd be greatly apprec

I Baught A iMac 2010 From Someone it came with lion but for the programs i use i need snow leopard but when trying to install it won't boot from usb or cd what can be the problem i've been at this for over 24 hours if anyone ca help it'd be greatly appreciate it! Thanks!

Downgrade OS X Lion To Snow Leopard [Video How-To]
http://www.cultofmac.com/110614/downgrade-os-x-lion-to-snow-leopard-video-how-to /
How To Downgrade OS X Lion To Snow Leopard: The Complete Tutorial
http://www.redmondpie.com/how-to-downgrade-os-x-lion-to-snow-leopard-the-complet e-tutorial/
How To Downgrade from Apple OS X Lion to Snow Leopard
http://www.pcmag.com/article2/0,2817,2389334,00.asp

How can I retrieve my files when my iMac won't boot?

My iMac won't boot up, which may be related to a recent update to Mavericks. I've tried repairing the disk from the DVD startup - it finds invalid volume file counts and says it's repaired them, but the same thing happens when I try to boot, the screen goes dark, the cursor is still visible and movable, but that's it. Foolishly, I didn't make a back-up so I'm now trying to retrieve some files at least. Using disk utility I've been able to copy everything to an external drive but I still can't get access to the files because it won't boot from there either, same old volume errors turn up when I try to repair it. Will I have to buy another mac just to access the files?

Assuming you are running OS X Mavericks (10.9.4), try booting into your Recovery HD by pressing/holding Command+R at startup. When you see the OS X Utilities Menu, plug in a USB external drive with an empty partition. Select Reinstall OS X from the menu and install Mavericks to you external drive. After the install is completed, your system should boot to your external drive to completed Setup. You might be able to use your internal iMac drive and Setup Assistant to bring over you User accounts and Apps to the external.

My iMac can't boot Windows 7 From USB while my Macbook Pro can do it

I install Windows 7 64 bit and rEFIt into a USB hard disk and hope to boot from my iMac 27" (2010 Mid). However, it shows that no boot deivce is found.
If I plug the SAME disk to my Macbook Pro 17" (2009 Mid), it can boot Windows 7 without any problem.
I tried with Linux and get same result, iMac says no boot device while my Macbook Pro can boot it without problem.
I tried experiment for weeks and still can't get iMac work.
I think it is very abnormal and I wonder if someone can tell me how to fix it or any directory to solve this problem.

My iMac runs snow leopard and my MacBook pro runs Lion. Both of them are updated with latest updated. I just get one external USB hard disk with Windows 7 32 bit installed and magically, my iMac can boot it from rEFIt. However, I don't know what makes it works. I tried to make same configuration, software and steps on other USB hard disks for hundreds times but I can repeat it again. All other attempt can make USB hard disk boot on MacBook Pro but not iMac only.

I have an older iMac 5,1 and the disc drive no longer works. I was hoping that I could the Apple USB super drive as a replacement, but the info on the super drive page says compatible with iMac 2012 or later. Does anyone know why it would not work for me?

I have an older iMac 5,1 and the disc drive no longer works. I was hoping that I could the Apple USB super drive as a replacement, but the info on the super drive page says compatible with iMac 2012 or later. Does anyone know why it would not work for me?

A reply to similar question (Q & As , in product page Apple Store) says:
"...dissable the internal reader hardware from devices setup. Then plug the external usb superdrive and that's it." Answered by Enrique T from Lima Oct 25 2013.
If you can locate an external Apple USB 'Air" superdrive for earlier model MacBook Air, that should work. The newer one for the Air is the same as for iMac, now.
You may be able to use other brands of external USB optical drive with your older intel-based iMac, as some of them function capably. A few should also be able to see system discs or other bootable utilities on DVD.
Hopefully this helps.
Good luck & happy computing!

Blue screen when booting from USB drive in UEFI mode (2013.07)

SOLUTION for me was to update the firmware on my ASRock mb as thatu pdate changed the EFI software (by American Megatrends) version from 2.00 to 2.31. However, other users are still experiencing the blue screen.
SHORT VERSION
When I try to boot Arch Linux 2013.07 with an USB drive in UEFI mode (for installation), I get a blue screen (which is rather a literal description and not a hint towards the old Windows' one) with the message
Failed to install override security policy (14): Not found
LONG VERSION
I made an USB installation media (product: Intenso Rainbow) by following this advice on the wiki.
I used the july release of Arch for that. First of, after installing the image to the USB stick I found that I needed to correct the label in the archiso-x86_64.conf file to ARCH_201307 (or was it the label of the usb stick, can't remember right now). (Pretty sure it was the same problem with "Linux Live USB Creator" which I used 3-4 months ago...)
After doing that, I rebooted and selected the entry
UEFI Intenso Rainbow
from this list of entries:
SATA HDJ ... something (the hard drive where Win 7 64 bit is installed with all programs)
SATA something (hard drive which only contains data)
Windows Boot Manager
USB: Intenso Rainbow
UEFI: Intenso Rainbow
It went to a blue screen with a message in white text saying
Failed to install override security policy (14): Not found
Below that was an OK button which had a black rectangle over it.
After I experienced the bluescreen, I tried booting the
USB Intenso Rainbow
entry and the boot process then worked fine, I got to that Arch menu where I could choose
Boot Arch Linux (x86_64)
Boot Arch Linux (i686)
Boot existing OS
Run Memtest...
and so on...
But just to make sure, I then did the check for UEFI mode according to this and only saw a folder acpi and ... something else I can't really remember, but it definitely was not efi. Thing is, I needwant to boot into UEFI mode as I have Win 7 already installed in UEFI mode.
Some info about my motherboard: it's from ASRock and is called H67M. The BIOS is dated to 2011-10-26 and is version 1.7.
So far, I only found a mention of the problem here at superuser.com.
Last edited by jones (2013-07-15 07:15:18)

Ok then, so this thread has also become about the blank screen problem when booting (in this particular case, Arch 2013.06 since 2013.07 seems to be worse).
srs5694 wrote:Typically, you adjust kernel boot options using your boot manager or boot loader. In GRUB, you hit the "e" key to open an editor. In rEFInd, you hit F2 or Insert twice. I don't recall offhand what key does the job for gummiboot (which I'm pretty sure the Arch installer uses), but I'm certain it's got the feature.
You are right. Thanks. I realized I had the gummiboot config right in front of me all the time. It's the file 'archiso-x86_64.conf' in \loader\entries (on Windows).
An addendum: I think the USB: Intenso Rainbow boot option takes me into a GRUB menu. Hitting 'e' in this "big" and fully designed menu didn't do anything IIRC. Hitting 'Tab' did the trick to get into editing the boot command line.
Hitting 'e' worked in the gummiboot menu though.
So I tried booting with the following options (also by combining some of them)
nomodeset
acpi_backlight=vendor
radeon.modeset=0 (I have a Gigabyte 7870 card in this desktop machien)
i915.modeset=0
but it did not help.
To be rather safe than sorry: I should mention that there are two grey-ish bars visible on the top and bottom of the screen after I try to boot the first entry, Arch Linux archiso x86_64 UEFI USB. Always has been with those two older Arch version (2013.05+2013.06). I also found another thread where one user talks about using the VGA port of the monitor, which I am currently not, I am using the DVI one, so that's worth a try too. EDIT It did not help either. What I did was setting the primary graphics adapter in the UEFI north bridge configuration menu to 'onboard' which worked immediately when rebooting (I hit the button labeled "Source" on my monitor and it showed it is using the "Analog" mode), but the problem just stayed the same. Adding aforementioned boot options or a combination thereof did not change anything.
Thanks for the e-mail addresses, I sent one to James Bottomley.
Last edited by jones (2013-07-07 11:12:05)

IMac 2012 Slooooow Boot when USB atached

Similar Messages

Maybe you are looking for