How to reset Start Up Disk

I used the command System Preferences -> Startup Disk to select the partition that has the OS as the only partition to boot. Now, when I start up the machine with the option key pressed, it doesn't show the Recovery volume and it won't let me start with an external flash drive. How do I fix this? Thanks.

If you have no recovery partition, then you did not install OS X properly or you deleted the partition. You can restore it: Recovery Partition Creator 3.7 – Updated for Mavericks | Musings.
I assume your flash drive does not have a bootable system installed.

Similar Messages

How to empty start up disk

How do I empty or reduce the items in my start up disk?

You can use products like Omni DiskSweeper, Daisy Disk, and Grand Perspective to breakdown and identify your file types and space they take. DiskSweeper will aid you in group file removal too.
Check also in the AppleMenu>About This Mac>Moreinfo>Storage to see if you have a significant amount of space taken up by Backups (Local Backups). If you do, eiter proceed to sync with your Time Machine drive, or turn off Time machine altogether to delete the Local Backups, if the space concerns you.

How to show start up Disk on Desk top??

I am use to my iMac having the Hard Disk / Start up disk on my Desk top. Recently bought a Mac Book Pro. Is there a way to have the Hard Disk appear on the Desk Top?

Check the settings in the General tab of the Finder's preferences.
(59977)

HT201364 how to remove start up disk space

im using my macbook pro got in 2009 and need more memory to download updates

Here are some general tips to keep your Mac's hard drive trim and slim as possible
You should never, EVER let a conputer hard drive get completely full, EVER!
With Macs and OS X, you shouldn't let the hard drive get below 15 GBs or less of free data space.
If it does, it's time for some hard drive housecleaning.
Follow some of my tips for cleaning out, deleting and archiving data from your Mac's internal hard drive.
Have you emptied your Mac's Trash icon in the Dock?
If you use iPhoto, iPhoto has its own trash that needs to be emptied, also.
If you store images in other locations other than iPhoto, then you will have to weed through these to determine what to archive and what to delete.
If you use Apple Mail app, Apple Mail also has its own trash area that needs to be emptied, too!
Delete any old or no longer needed emails and/or archive to disc, flash drives or external hard drive, older emails you want to save.
Look through your other Mailboxes and other Mail categories to see If there is other mail you can archive and/or delete.
STAY AWAY FROM DELETING ANY FILES FROM OS X SYSTEM FOLDER!
Look through your Documents folder and delete any type of old useless type files like "Read Me" type files.
Again, archive to disc, flash drives, ext. hard drives or delete any old documents you no longer use or immediately need.
Look in your Applications folder, if you have applications you haven't used in a long time, if the app doesn't have a dedicated uninstaller, then you can simply drag it into the OS X Trash icon. IF the application has an uninstaller app, then use it to completely delete the app from your Mac.
To find other large files, download an app called Omni Disk Sweeper.
Download an app called OnyX for your version of OS X.
When you install and launch it, let it do its initial automatic tests, then go to the cleaning and maintenance tabs and run the maintenance tabs that let OnyX clean out all web browser cache files, web browser histories, system cache files, delete old error log files.
Typically, iTunes and iPhoto libraries are the biggest users of HD space.
move these files/data off of your internal drive to the external hard drive and deleted off of the internal hard drive.
If you have any other large folders of personal data or projects, these should be archived or moved, also, to the optical discs, flash drives or external hard drive and then either archived to disc and/or deleted off your internal hard drive.
Good Luck!

Imac will not see my hard drive on start up, wants to start from network start up disk that does not exist. How to get rid of it? So there is just one choice / my hard drive.

I have a Intel duo Imac. Everything has been running relatively smoothly for a few years now. All of a sudden my computer will not start. I get the flashing folder with a question mark.
When I go to Start up disk in my system perfernces while the computer is on. I see 2 possible choices. One is my hard drive with the operating system shown. The other is a non-existant Network Start up disk with a question mark in it ( looks like a hard drive with a question mark and it say's its a "network start up disk).
All I think I want to do is get rid of the Network startup with the question mark. I can not find anywhere how one can just remove an old or non existant start up disk without reformatting.
I believe this came from a clients hard drive who had a network system on it. We no longer have that drive. It no longer exists. But a latent icon shows up in start up disk.
When I go to change the start up disk. I can change it to either the hard drive or the network with the question mark. But when I select my hard drive and then got to restart the computer. I get the flashing folder with a question mark on start up. I have also seen the flashing globe a couple times.
When I attempt to run disk utility from may install disk ( holding down "C" on start-up ). Disk utility does not see my hard drive. Just the Apple install disk with the disk utility on it.
What can I do to remedy this short of re-installing? Will a program like Disk Warrior or Tech Tool help?

Thank you. That's what I thought will need to happen.
One more question. I tried using the Apple install disk that came with the computer. It's an OS 10.5.6 disk. It does not see my 10.6.8 system internal hard drive to repair. All it see's is itself 10.5.6 disk. Do you think I can use a 10.8+ disk utillity since that is a higher system it will see the 10.6.8. Where the 10.5.6 does not?
I don't want to turn the computer off for fear I'll get the question mark again. P-Ram got me going last time but for how long I don't know? It would be nice to be able to turn the computer off for the night and startup as usual to give it a rest and try to reset itself.
Thanks for your help, I know I will eventually need to re-install. But I am in the middle of a project with tight deadlines and all I can do right now is back-up. Trying to migrate to another computer temporarily to finish the job. That's a lot of extra work in the short time also.
Just trying to put a band-aid on it for another couple weeks.

I have a 2008 macbook and i lost the start up disk and forgot the password. how can i put it back to factory mode and change the password

i have a 2008 macbook and i lost the start up disk and forgot the password. how can i put it back to factory mode and change the password

Check out this article http://gigaom.com/apple/reset-os-x-password-without-an-os-x-cd/

I've forgotten my Administrator Password. When researching, it generally tells me I need to reboot my account with the original start-up disk. Is there a way to go about resetting your password without the disk?

Please if anyone can be of help whom knows how to reset your adminsistrator password without your original start-up disk, I would really appreciate it! Thanks

Try the method as mentioned by " Ds Store " in the below User Tip. You will have to boot your Mac in Single User Mode where you can reset the Password using Terminal Command and without the Snow Leopard Disc.
https://discussions.apple.com/docs/DOC-5381

Resetting Administrator and password on Power Mac G5 without start up disks

Is it possible to reset the user name and password without the start up disks and if so how can it be done?
StevStep

StevStep wrote:
Is it possible to reset the user name and password without the start up disks and if so how can it be done?
Do you know the password for an existing user account? If so, just log in as that user, go to the Accounts system preference & click the "Change Password..." button to change it. You can also change the 'long' user name to whatever you want in the "User Name" box in that same preference.
However, if you want to change the 'short' name of any account (the one used for the account's home folder, the Reset Password utility on the Mac OS X Install disc won't help -- it just allows anyone that can boot the Mac with that disc to reset the admin password, but not change the user short name associated with it.
To do that follow the procedure in Mac OS X: How to change user short name or home directory name. Of course, to do that, you need to know the password for an admin account (to enable the root user), so if you don't know the password for any admin account, you would need to use the reset password utility from an installer disc.
AFAIK, any Mac OS X Install disc capable of booting the Mac in question can be used for this, & using one that you don't actually own should not violate the software license agreement, since you are not using that disc to install anything.

Where can I find the Start up disk and how can I delete file from it.

where can I find the Start up disk on theMac Book Air?
How can I delete files from it?

The startup disk is the internal SSD in your MBA. You may delete files by draging the file to Trash (or clicking on them and then execute COMMAND+Delete). Then empty Trash.
Ciao.

How do I create a start-up disk for Lion

I would like to resize the Boot Camp partition on my new iMac running Lion 10.7.2. To do that, using iPartition, I need to boot the system from another drive. Ideally I'd like to use a USB flash drive or a DVD as the alternative boot drive.
Obviously I can't boot from the Recovery HD partition on the iMac's boot drive, so I used Recovery Disk Assistant to build a Recovery HD on a flash drive. When I boot the system up from that flash drive I can see the icons for all of my files on the iMac, including those on the secondary hard drive, where iPartition lives, but I can't seem to launch any applications, including iPartition, because they are all grayed out. Best I can tell, the Recovery HD is designed to provide installation and repair services, but doesn't give you a fully functioning OS.
So my question is: How do I create a disk that will allow me to start-up a fully functioning copy of Mac OS X Lion from a drive other than my normal boot drive? My second question is: Do I need to move iPartition to that drive or will it run from the secondary drive built in to the iMac.
I'm a newbie to the Apple world, so if the answer is completely obvious, please forgive me for asking.
Bob

I used SuperDuper to create a bootable clone on an external drive where I installed my maintenance programs. Now whenever I need then I just boot from it.
Allan

How do I make multiple start up disks

I've partitioned my Imac(intel) for lion and leopard but can only start up in leopard. how do I make both partitions start up disks?

babowa wrote:
Frankly, I'm stumped because I didn't know that Time Machine backups are bootable?
The backups aren't, but when you restore them, the result is bootable.
And, effective with 10.7.2, if you back up to a directly-connected external HD, Time Machine copies the Recovery HD to the Time Machine drive, so you can start up from it if your internal dies.
Take a look at this site (in particular scroll down to Time Machine):
Just for future reference, since Apple's dropping web hosting via MobileMe, I've moved my site.
The new version is at http://pondini.org
I'll leave the old one "as is" for a few days, then put redirect notices on it until it goes "poof" in June.

I bought mountain lion for my macbook pro and I'm trying to install it and it says there was an error and I need to boot up but I don't have any other start up disks to boot up with. Are there any suggestions of how I could get my computer started?

I bought mountain lion for my macbook pro and I'm trying to install it and it says there was an error and I need to boot up but I don't have any other start up disks to boot up with. Are there any suggestions of how I could get my computer started?

Hold the Option key down and restart. Select one of the drives that comes up and hit the Return key.

How can I create a start up disk for a old intel core duo running 10.5.8.. Computer works fine, but can't find install disk.

How can I create a start up disk for a old intel core duo running 10.5.8.. Computer works fine, but can't find install disk. Want to use internal disk drive or USD flash drive.

Try calling 1-800-676-2775. Give the serial number and thy *may* still burn you new install disks designed just for the hrdware in your system (for a fee, something like $160 per disk). *May* is only because they may not burn disks for Leopard anymore.
If they do not burn them for you, you can buy Leopard disks off Amazon or eBay for about $200.
Have you considered Snow Leopard?. Those disks only cost $19 (single user) or $29 (5-user license) through Apple by calling 1-800-MY-APPLE.

My start up disk is almost full and seems to have lots of files in other how can i tell what they are

I keep getting the message saying that my start up disk is nearly full and I have been deleting as many files as I can but now I find that actually it isn't my photos which I thought it might be, I have no music, videos or movies downloaded and just a small amount of document files. It seems that I have 91.56 GB of files in 'other' does anyone know what they might be and how I find out what they are?
Thanks

See here for answer about what is taking up space:
http://pondini.org/TM/30.html
and here:
http://pondini.org/OSX/DiskSpace.html
Seen in your "about this MAC" under storage as "OTHER

I keep on getting message that my start up disk is full. How do i resolve this?

i keep on getting message that my start up disk is full. How do i resolve this?

Move items you don't need on it, such as the iTunes and iPhoto libraries, to another drive, verify they work in the new location, and then delete them from the internal drive. If you don't need something at all, drag it to the Trash and empty it.
(91713)

How to reset Start Up Disk

Similar Messages

Maybe you are looking for