Hi,

Just to clear up some info here.  Usually, if you have successfully installed 
the MacOS onto an internal or external drive, it is automatically bootable.  
The only expectation is that the partition map scheme is GUID.  When in Disk 
Utility, when first setting up your drive, you can select the drive, select the 
Partition tab, go to the Options button, select the GUID Partition Map scheme 
and Apply it.  You can subsequently install your Mac OS on it.    Normally, the 
install will fail if it's not initialized with the is scheme but stranger 
things have happened.

Later...

Tim Kilburn
Fort McMurray, AB Canada

On May 16, 2014, at 8:16 PM, Cameron Strife <[email protected]> wrote:

> Hi. With external drives, the first thing I'd suggest is trying
> another cable. If nothing else, it rules out the cable being an
> issue...
> 
> Cameron.
> 
> 
> 
> 
> On 5/16/14, Jeff Berwick <[email protected]> wrote:
>> Actually, forget it.  Now it isn't showing up in disk utility at all...Guess
>> there is something amiss inside my Macbook Pro :(.
>> 
>> Jeff
>> 
>> On May 16, 2014, at 9:45 PM, Jeff Berwick <[email protected]>
>> wrote:
>> 
>>> I have replaced the internal drive, but it is only seen sometimes.  I'm
>>> actually running off my old drive connected externally.  The new drive
>>> shows up in disk utility, but not as a boot-up option.  We installed
>>> Mavericks on the new drive, and it seemed to go okay.
>>> 
>>> I suspect that there may be something else wrong internally, but was
>>> hoping that I could find a way to mark the new disk as bootable and save
>>> myself the cost and trip to the Apple store.
>>> 
>>> Jeff
>>> 
>>> On May 16, 2014, at 9:32 PM, Cameron Strife <[email protected]>
>>> wrote:
>>> 
>>>> Hi. So, just so we're on the same page here, you replaced an internal
>>>> drive on a machine with one drive in it and you can only boot from it
>>>> some of the time? did the OSX install go okay?
>>>> 
>>>> Cameron.
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> On 5/16/14, Jeff Berwick <[email protected]> wrote:
>>>>> Is there a way of making a drive bootable?  I have just had my computer
>>>>> crap
>>>>> out on me, and I have replaced the drive.  It shows up sometimes, but
>>>>> not
>>>>> always.  I am unable to boot from it and, before I take the computer in
>>>>> for
>>>>> a serious look-over, I'd like to try this.
>>>>> 
>>>>> Thx,
>>>>> Jeff
>>>>> 
>>>>> On May 16, 2014, at 9:24 PM, Cameron Strife <[email protected]>
>>>>> wrote:
>>>>> 
>>>>>> Hi. If you have a bootable drive, you can boot from it by going into
>>>>>> system preferences and selecting the drive in startup disk. Or, hold
>>>>>> down the option key when you hear the chime when restarting the
>>>>>> machine. This will give you a list of available devices to boot
>>>>>> from;internal hd, superdrive etc. If it is a bootable drive, you
>>>>>> should be able to select it from that list using the arrow keys then
>>>>>> hit enter. You may need to guess, or, just grab someone with some
>>>>>> working eyeballs to tell you how many times you need to arrow before
>>>>>> hitting enter.
>>>>>> 
>>>>>> Hope that helps,
>>>>>> 
>>>>>> Cameron.
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> On 5/16/14, Lee Jones <[email protected]> wrote:
>>>>>>> Dear List I wondered if anyone knows of a podcast or tutorial on how
>>>>>>> to
>>>>>>> create a bootable drive and then get the mac to boot from the
>>>>>>> external
>>>>>>> either a clone or set up from scratch.
>>>>>>> 
>>>>>>> Many Thanks Lee
>>>>>>> 
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