Cannot start my mac, tried resetting pram and smu, I cannot even boot up from SL disc anymore. any other suggestions
Firstly apologies for any spelling or typos but I'm typing from my iPod touch!
My initial problem was that my mac kept crashing soon after start up on 10.6.7. After installing the is back to 10.6 it seemed to be work ok but not great. After updating to 10.6.7 the problem came back so once again I reverted back to 10.6. Then 10.6.8 was released not long ago so I gave it a try... Same issue.
Now I want to revert back to 10.6 but it's not letting get past the grey screen with the apple logo with the spinning thing underneath. I have tried resettin smu and pram but I get nowhere. Booting from my snow leopard disk to revert no longer works. So where do I go from here???
Please help somebody.
Thanks,
Carl
So as it stands my iMac has the Snow Leopard disc inside as the startup disc. As a result it is now not allowing me to boot up in safe mode and perform smu or pram resets. It goes straight to the grey screen with the Apple logo with the spinning thing underneath.
It just keeps spinning and spinning i thought i'd persevere and leave it and see what happens. TWICE i've left it hanging for 2 hours (while i popped out) and came back with the same grey screen.
This is now worrying me because as a worse case scenario i cannot even remove all my data before trashing it (or throwing it out of the window which seems like the more attractive option right now).
If anybody out there has any more suggestions please please put a post on here.
Many thanks in advance,
Carl.
PS. Why wouldn't it even attempt to start for the snow leopard disc? I can understand that it can't boot from the system but surely booting up from the DVD should always work???
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Imaclate2012,
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2) Only could start bootcamp
3) Tried resetting nvram
4) Could not start even in bootcamp
5) Verify disk says …. Verifying volume “Macintosh HD”
Error: Live file system repair is not supported
6) Installed maverick on USB drive
7) Boot from USB drive. Tried verifying HD: Volume header needs minor repair. The volume Recovery HD was found corrupt and needs to be repaired. Verifying volume “Macintosh HD”: Error: live file system repair is not supported.
8) The terminal code says
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10) xxxx-MacBook:~ xxxx$ diskutil list
11) /dev/disk0
12) #: TYPE NAME SIZE IDENTIFIER
13) 0: GUID_partition_scheme *160.0 GB disk0
14) 1: EFI EFI 209.7 MB disk0s1
15) 2: Apple_HFS Macintosh HD 80.1 GB disk0s2
16) 3: Apple_Boot Recovery HD 650.0 MB disk0s3
17) 4: Microsoft Basic Data 50.0 GB disk0s4
18) /dev/disk1
19) #: TYPE NAME SIZE IDENTIFIER
20) 0: GUID_partition_scheme *15.6 GB disk1
21) 1: EFI EFI 209.7 MB disk1s1
22) 2: Apple_HFS BOOT 14.8 GB disk1s2
23) 3: Apple_Boot Recovery HD 650.0 MB disk1s3
24) Saeedehs-MacBook:~ saeedehmirbagheri$ diskutil cs list
25) No CoreStorage logical volume groups found
26) Saeedehs-MacBook:~ saeedehmirbagheri$ sudo gpt -vv -r show /dev/disk0
27) Password:
28) gpt show: /dev/disk0: mediasize=160041885696; sectorsize=512; blocks=312581808
29) gpt show: /dev/disk0: PMBR at sector 0
30) gpt show: /dev/disk0: Pri GPT at sector 1
31) gpt show: /dev/disk0: Sec GPT at sector 312581807
32) start size index contents
33) 0 1 PMBR
34) 1 1 Pri GPT header
35) 2 32 Pri GPT table
36) 34 6
37) 40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
38) 409640 156394528 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC
39) 156804168 1269544 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
40) 158073712 56853648
41) 214927360 97652736 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
42) 312580096 1679
43) 312581775 32 Sec GPT table
44) 312581807 1 Sec GPT header
45) xxxx-MacBook:~ xxxx$ sudo fdisk /dev/disk0
46) Disk: /dev/disk0 geometry: 19457/255/63 [312581808 sectors]
47) Signature: 0xAA55
48) Starting Ending
49) #: id cyl hd sec - cyl hd sec [ start - size]
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I booted from external USB. The diskutil list output is from OS x booting from the USB, which shows the following:
Saeedehs-MacBook:~ saeedehmirbagheri$ diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *160.0 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 80.1 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
4: Microsoft Basic Data 50.0 GB disk0s4
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *15.6 GB disk1
1: EFI EFI 209.7 MB disk1s1
2: Apple_HFS BOOT 14.8 GB disk1s2
3: Apple_Boot Recovery HD 650.0 MB disk1s3
Saeedehs-MacBook:~ saeedehmirbagheri$ diskutil cs list
No CoreStorage logical volume groups found
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