Q: Bootable usb drive not working

I'm using a 20 inch imac (early 2008) it has tiger on it.The specs are an intel core 2 duo @ 2.4GHz, 4gb of ram 160gb HDD. I put snow leopard 10.6.8 on the flash drive (it currently has tiger 10.4.11) and i made it with disk utility. The partition is guid, and it doesn't show up in startup disk. I tried a .dmg of snow leopard but it says i need leopard 10.5 and I don't have a copy. Also the fan is always running at a high rpm.

iMac, Mac OS X (10.4.11)

Posted on Jan 21, 2015 3:56 PM

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Q: Bootable usb drive not working

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by OGELTHORPE,Helpful

OGELTHORPE Jan 21, 2015 4:00 PM in response to 10114jose
Level 9 (52,812 points)

Mac OS X

Jan 21, 2015 4:00 PM in response to 10114jose

What was the source of the Snow Leopard USB drive? If it was not the Snow Leopard retail disk, it will not work with your iMac.

Ciao.
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by 10114jose,

10114jose Jan 21, 2015 5:31 PM in response to OGELTHORPE
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Jan 21, 2015 5:31 PM in response to OGELTHORPE

The flash drive doesn't have a retail copy and I just ordered snow leopard. So when I receive the dvd it should work 100%?
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by OGELTHORPE,Helpful

OGELTHORPE Jan 22, 2015 2:28 AM in response to 10114jose
Level 9 (52,812 points)

Mac OS X

Jan 22, 2015 2:28 AM in response to 10114jose

Yes. A 2008 iMac can run the latest OSX. Note that if you want a newer OSX than Snow Leopard, you will have to to upgrade it to 10.6.8. The simplest way is to use the combo update.

http://support.apple.com/kb/DL1399

Ciao,
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by 10114jose,

10114jose Jan 22, 2015 10:31 AM in response to OGELTHORPE
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Jan 22, 2015 10:31 AM in response to OGELTHORPE

My fan is running at full speed all the time. I have reset the smc butit didn't work. Do you know anything else I can do to fix it?
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by BDAqua,

BDAqua Jan 22, 2015 11:01 AM in response to 10114jose
Level 10 (123,905 points)

Jan 22, 2015 11:01 AM in response to 10114jose

Get Temperature Monitor to see if it's heat related...

http://www.bresink.com/osx/TemperatureMonitor.html
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by OGELTHORPE,

OGELTHORPE Jan 22, 2015 11:16 AM in response to 10114jose
Level 9 (52,812 points)

Mac OS X

Jan 22, 2015 11:16 AM in response to 10114jose

Open Activity Monitor and see if there are any applications taking a lot of CPU resources:

http://support.apple.com/en-us/HT203184

Run an Apple Hardware Test:

http://support.apple.com/en-us/HT201257

Note that an error free AHT is not definitive.

Ciao.
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by 10114jose,

10114jose Jan 22, 2015 7:24 PM in response to OGELTHORPE
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Jan 22, 2015 7:24 PM in response to OGELTHORPE

There are no apps taking a lot of cpu resources.. As soon as I start the imac the fan ramps up to 100%. The apple hardware test doesn't work. It just boots into osx. I'm guessing the applications install disk 2 isn't installed to it.
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by OGELTHORPE,

OGELTHORPE Jan 23, 2015 3:15 AM in response to 10114jose
Level 9 (52,812 points)

Mac OS X

Jan 23, 2015 3:15 AM in response to 10114jose

Try the one listed here for your iMac:

https://github.com/upekkha/AppleHardwareTest

Ciao.
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by 10114jose,

10114jose Jan 23, 2015 10:44 AM in response to OGELTHORPE
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Jan 23, 2015 10:44 AM in response to OGELTHORPE

According to the apple hardware test it passed. I did the the 2 minute test and half hour test.
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by OGELTHORPE,

OGELTHORPE Jan 23, 2015 10:50 AM in response to 10114jose
Level 9 (52,812 points)

Mac OS X

Jan 23, 2015 10:50 AM in response to 10114jose

Did you download the temperature monitor as suggested by BDAqua. If so, what temperature are you experiencing?

Ciao.
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by 10114jose,

10114jose Jan 23, 2015 12:01 PM in response to OGELTHORPE
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Jan 23, 2015 12:01 PM in response to OGELTHORPE

Cpu core 1 is 49 C, 2 is 46 C, everything else related to the cpu is about 38 C, Graphics is about 47C,motherboard is
38C,PSU is about 64C, The Wireless module is around 53C,
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by OGELTHORPE,

OGELTHORPE Jan 23, 2015 12:05 PM in response to 10114jose
Level 9 (52,812 points)

Mac OS X

Jan 23, 2015 12:05 PM in response to 10114jose

Those are all acceptable temperatures. I can only suggest bringing in the iMac to an Apple store genius bar and have them determine why the fan is at maximum speed. As I said earlier, the AHT is not 100$% reliable when it is error free.

Ciao.
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by 10114jose,

10114jose Jan 23, 2015 1:51 PM in response to OGELTHORPE
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Jan 23, 2015 1:51 PM in response to OGELTHORPE

The enthernet port isn't working either. In the network diagnosatics it says failed. I know the cable works. I use with my PC all the time. Thanks OGELTHORPE and BDAqua for your help with this imac.
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by 10114jose,

10114jose Jan 23, 2015 4:58 PM in response to 10114jose
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Jan 23, 2015 4:58 PM in response to 10114jose

I'm doing a clean install of Snow Leopard right now. Maybe it might fix the Ethernet problem, but I doubt it.
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