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When my Mac is start, I press the "option" key but boot menu does not shows... I try to reset the NVRAM, it helps but once... If I want to show boot menu again I need to reset NVRAM again and again.
P.S. Keyboard works correctly.
P.S.S. Sometimes I can't reset NVRAM. :(
Thanks.
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Resetting is meant to be an emergency troubleshooting/repair procedure, not a cure all or daily practice an SMC reset, for example, should only be attempted after all other standard troubleshooting has been performed. NVRAM only "resets" Speaker volume, Screen resolution, Startup disk selection and Recent kernel panic information, if there is any.
I don't know why you think/or need to change boot order but the correct way is to go to System Preferences-> Startup Disks:select the partition you wish then restart.
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I just need to select boot order when I install Windows (Boot Camp), and to install OS X.
example: I boot OS X, and need to reboot to windows. I reboot my Mac, press options, and... ...nothing. In OS X Preferences>Boot partition have only Mac OS.
So what can I do?
I sorry for my English (I from Ukraine).
I hope you can help me.
You may have pooched or corrupted boot camp or WinDUHows install. See this article. Also the flavor of OS and boot camp makes a difference. From windows you go to the "Boot Camp" icon in Control Panel (may have to switch to Classic View) and choose the startup disk from there.
I use.
Mac OS X Mountain Lion 10.8.5
Boot Camp - 5.0.4
Windows 7 Ultimate x64
Disc volume "Bootcamp" - create in Boot Camp assistant. But when windows install is begin I format this label (NTFS).
Read (study) the boot camp instructions, or, you will have problems.
When you’re asked where to install Windows, select the partition named “BOOTCAMP.” Do not create or delete a partition, or select any other partition. Doing so may delete the entire contents of your Mac OS X partition.
The Windows installer formats the boot camp "Windows partition" using the NTFS file system.
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Pressing the Option key only displays the bootable volumes if you hold it down before pressing the power button. My normal practice is to hold down the Option key, then press the power button, and keep holding down the Option key until the boot volume icons appear.
As machead3 says, if the drive that's currently your default boot volume isn't the one you want, you shouldn't be fooling around with Option-boot; you should change the default boot drive in the Startup Disk system preference.
Okay, the Boot Camp thing is something we needed to know to begin the discussion. I think machead3 and I were both assuming that you were switching between two OSX volumes. Anyway...
The fact that Windows doesn't appear as a boot option suggests that the installed copy of Windows is not bootable. Both the Option-power trick and the Startup Disk system preference should display all bootable volumes; have you looked in Startup Disk to see if Windows (whatever_version) appears there?
There's some information we should find out before we get too much deeper into this.
1) What version of OSX are you using - 10.6, 10.7 or 10.8?
2) What version of Boot Camp are you using?
3) What version of Windows are you trying to install and boot from, and where did you get it?
4) On what disk and volume are you trying to install Windows?
Apple Boot Camp 4, OS X Lion and Mountain Lion: Frequently asked questions
Boot Camp has certain built-in limitations. It has to install Windows on the internal boot volume, and the OSX boot volume and the Boot Camp volume are on a single partition. If you have partitioned your internal drive into multiple volumes before running Boot Camp, the Boot Camp installer may not work correctly. The BC Assistant does its own partitioning as part of the install process.
You can boot from a copy of Windows installed on an external drive, but the Windows Startup Disk control panel will not see it, since Windows is designed to boot from internal drives. You'll have to use the Option-power trick every time you want to start up. Since Boot Camp will only install on an internal drive, you'd either have to remove the internal drive (with Windows installed) and put it in a USB/FireWire enclosure, or else clone your internal drive to an external drive using a GUI utility like SuperDuper!, Carbon Copy Cloner, or Terminal utilities like ditto or dd.
The minimum version of Windows that Boot Camp will install is Windows XP Service Pack 2; older versions of Windows can only be installed as virtualized environments. Officially, you're required to use a fully licensed retail install disk for Windows, not an OEM version (one that was bundled with a prebuilt Windows computer).
When you boot from OSX and open Disk Utility, can you see the Windows partition in the left sidebar? Unlike FAT32, OSX does not natively write to NTFS volumes. There are several NTFS-on-Mac drivers that will allow OSX to mount and write to NTFS volumes, including the Open Source NTFS-3g and the commercial Paragon NTFS for Mac. Once one of these drivers is installed, you can use Disk Utility to do some basic repair on the Windows partition.
If you can give us some more detail on where you are in the Windows install process and how you got there, we'll see if we can offer more help.
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I try your method and... ...nothing.
How do I choose the operating system that starts up (boots) my Mac?
After running Boot Camp Assistant and installing Microsoft Windows and the Boot Camp drivers, hold the Option (Alt) key when you start up to switch between Microsoft Windows and Mac OS X. Use the Startup Disk control panel in Windows or Mac OS X Startup Disk preferences to set the default operating system to use each time the computer starts up.
I do this step, but boot screen does not shows.
Also when I select startup disk from Windows, my Mac is boot OS X, but in Boot camp settings in OS X does not have startup windows disk. And I need to reset NVRAM, and select boot order... :(
We don't know the version of OS X, WinDUHows or Boot Camp you are using telling us would be a big help! As I said you may have a corrupt or failed boot camp set up. Use the Startup Disk control panel in Windows or Mac OS X Startup Disk preferences to set the default operating system to use each time the computer starts up.'
I use. Mac OS X Mountain Lion 10.8.5 Boot Camp - 5.0.4 Windows 7 Ultimate x64 Disc volume "Bootcamp" - create in Boot Camp assistant. But when windows install is begin I format this label (NTFS).
sorry to revive an old thread, but i've got the same problem today. i installed windows 7 via bootcamp like 2 weeks ago and was running normal. this morning, when i reset mac os and press the option key, it won't do anything, it just boots as mac os again, it won't even show the recovery partition. keyboard and option keys are working ok when i type. the only thing i could think of is that i installed the loader to get rid of the validation, maybe i corrupted something? should i try to reinstall windows or is some method to repair it? thanks!
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I use. Mac OS X Mountain Lion 10.8.5 Boot Camp - 5.0.4 Windows 7 Ultimate x64 Disc volume "Bootcamp" - create in Boot Camp assistant. But when windows install is begin I format this label (NTFS).
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