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cant boot mac

Archived thread 1007459 from Apple Hardware Users. Markdown source: Apple_Hardware_Users/thread_1007459_cant_boot_mac.md

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#1

i have a new mac intel based and i installed ubuntu with bootcamp. when i restarted the computer i didnt saw the boot for mac and now i cant go to mac os :S i didnt erase the mac os drive is there a way to boot the mac again?

help me plz

#2

When you're booted into Ubuntu, can you paste this command into the terminal and then post the output back here? ``` sudo fdisk -l

#3

't support GPT. Use GNU Parted.

Disk /dev/sda: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x00000000

Device Boot Start End Blocks Id System /dev/sda1 * 1 19458 156290903+ ee GPT

#4

Yeah. Looks as if you wiped out OS X completely.

#5

but in linux i can see the mac hdd drive :S

#6

aysiu said: Yeah. Looks as if you wiped out OS X completely.

No no, that is just the MBR, everything is still there. The usual effect is failure to load grub and linux, and the cure is to run the refit partiton tool to sync the mbr.

#7

how can i do that? plz help me i dont want to lose my data on mac :S

#8

Have you got rEFIt?

#9

yeah but i cant access mac

#10

my mac is a intel based :S

#11

Are you using the ubuntu Desktop CD now, or what?

You can download refit in ubuntu and run gptsync. But it shoud not stop you from booting macosx. First try restarting while pressing 4 keys command-option-P-R That might reset so Macosx starts. Also the Macosx install DVD would be another way tocheck what happened.

#12

If you have the Macosx install DVD, you can use that to set the startup disk to your Macosx, that may be it.

#13

aysiu said: When you're booted into Ubuntu, can you paste this command into the terminal and then post the output back here? ```

sudo fdisk -l


fdisk does not support GPT formatted hard drives such as those found in Intel Macs. It can only read the MBR partition table. parted does support gpt though:

sudo parted /dev/sda print

#14

sorry for bothering you guys but i needed the computer fast and i gain the data from the mac dvd install disk but i lost lots of data but thx alot