OS X Mavericks :: How To Recover Old Installation On SSD After Installing Beta OS X On USB Thumb Drive
Jun 17, 2014
I just installed the brand new OS X 10.10 Yosemite beta 2 on a USB thumb drive. It almost works.Â
Now I want to boot my good old OS X 10.9 Mavericks from the SSD.
But there is no option for that, if I reboot the macbook holding the opt key!Â
I see only "Install OS", "Recover 10.9" and "OS X Yosemite", if I plug in the thumb drive.Â
But if I boot the OS X 10.10 beta 2 from the thumb drive, I can browser my SSD "Macintosh HD", see all the folders and files, it's still there!Â
If I choose "Recover 10.9", it says, I can re-install the OS X or recover my Mac from the time machine or ask for online support, what I'm actually doing.Â
How can I make the SSD bootable again, without re-installing the OS X and losing my data? Yes, there is still an option to restore from the time machine, but it's too long, I need my computer now.Â
It's a rMBP 15" early 2013.Â
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Oct 9, 2010
I'm trying to install ubuntu from a thumb drive. Basically, I'm converting the .iso to an .img, and restore the thumb drive from the .img, trying to make it bootable. I'm following the procedure form the ubuntu website. Drag and Drop a file from Finder to Terminal to 'paste' the full path without typing and risking type errors.
Download the desired file
Open the Terminal (in /Applications/Utilities/ or query Terminal in Spotlight)
Convert the .iso file to .img using the convert option of hdiutil (e.g., hdiutil convert -format UDRW -o ~/path/to/target.img ~/path/to/ubuntu.iso)
Note: OS X tends to put the .dmg ending on the output file automatically.
Run diskutil list to get the current list of devices
Insert your flash media
Run diskutil list again and determine the device node assigned to your flash media (e.g. /dev/disk2)
Run diskutil unmountDisk /dev/diskN (replace N with the disk number from the last command; in the previous example, N would be 2)
Execute sudo dd if=/path/to/downloaded.img of=/dev/rdiskN bs=1m (replace /path/to/downloaded.img with the path where the image file is located; for example, ./ubuntu.img or ./ubuntu.dmg).
Using /dev/rdisk instead of /dev/disk may be faster.
If you see the error dd: Invalid number '1m', you are using GNU dd. Use the same command but replace bs=1m with bs=1M.
If you see the error dd: /dev/diskN: Resource busy, make sure the disk is not in use. Start the 'Disk Utility.app' and unmount (don't eject) the drive.
Run diskutil eject/dev/diskN and remove your flash media when the command completes
Restart your Mac and press alt while the Mac is restarting to choose the USB-Stick
Everything goes through fine, except, when I restart my mac to see the boot options. All I see is Macintosh HD
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Mar 13, 2012
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iMac (24-inch Mid 2007), Mac OS X (10.6)
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Dec 6, 2014
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Jan 27, 2009
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Sep 2, 2009
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I upgraded to Snow Leopard last week.
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Aug 25, 2014
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Feb 16, 2012
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Feb 7, 2012
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MacBook Pro (13-inch Late 2011), Mac OS X (10.7.3)
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Mar 30, 2012
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Apr 4, 2012
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Apr 24, 2012
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May 1, 2012
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Oct 22, 2010
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Jan 9, 2009
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Feb 19, 2012
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MacBookPro, MacPro DualQuad, Mac OS X (10.5.2)
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