Hi Stuart,
Apple Partition Map (APM) scheme, the default for PowerPC-based Macs.
GUID Partition Table (GPT) scheme, the default for Intel Macs.
Cheers,
Ronni
On 19/11/2008, at 8:53 PM, Stuart Breden wrote:
A dumb blond question.
What are APM and GUID partitions?
Stuart Breden
PO Box 132
Kalamunda WA 6926
Hm Ph: (08) 9257 1577
Wk Ph: (08) 9291 4599
Mbl: 0417 053 266
On 02/11/2008, at 12:39 PM, Neil Houghton wrote:
Hi Bob,
(by the way, best to use a subject when you post - I've taken the
liberty of
putting one in)
Unless someone has come up with a new magic trick, it is not
possible to
have APM and GUID partitions on a single external drive.
As I understand it, you can have a number of partitions with
different
formats on a drive but APM or GUID refers to the drive's single
partition
table - it has to be one thing or another.
I have also read that you CAN boot an intel Mac from a APM drive,
it's just
that the OSX installer won't intall an intel system onto an APM
drive.
My understanding though is that you could copy your system from the
GUID
internal drive to an external APM drive and still boot from it. I
haven't
tried this myself, but I have seen this reported in various articles.
If it was me, given that hard drives are getting cheaper by the
minute, I
would get another drive and keep one as the GUID intel bootable
back-up and
the other as the APM PPC bootable back-up. However, if that is not
an option
for you, my understanding is that (space permitting) you could have
a 2
partition APM drive with one partition set-up as an intel bootable
back-up
(copied over from your existing intel system) and the other as the
PPC
bootable back-up.
Regarding transferring the stuff, I would generally use Apples
migration
assistant. I did have a few problems a while back with it - but I
think this
was more because I was migrating user accounts which had previously
been
migrated from earlier (jaguar on G4) systems - look back in the
archives if
you are interested in the saga!
The thing is to use migration assistant first-up and check that
everything
went over OK - then if there was any problem you always have the
option of a
clean re-install on the new mac and then set-up your accounts from
fresh and
copy over the data from the old machine - I expect you are unlikely
to have
problems or need this - but it's always nice to have a plan B!
Personally, I now always set up a new machine with an admin
account, with no
associated user data, I use this account to get all the software
updates
installed and then migrate the user account(s) over - I know a lot
would
consider this overkill and just migrate everything over but I like
having
the option of logging in to the admin account if there are any
problems with
the user account.
Also, although you can use migration assistant to transfer over all
your
applications, in your case, since you are going from PPC to intel,
I would
prefer to clean install all the applications before migrating the
user
accounts over.
Setting up, updating and transferring seems to be a fairly
subjective topic
- so you will probably find a few other preferred approaches out
there!
Hope that helps
Cheers
Neil
--
Neil R. Houghton
Albany, Western Australia
Tel: +61 8 9841 6063
Email: [EMAIL PROTECTED]
on 2/11/08 10:33 AM, Bob Jackson at [EMAIL PROTECTED] wrote:
I am currently using a PPC G5 iMac (OS 10.4.11) with a firewire
external hard drive for backup and will take delivery soon of a new
Intel iMac. Advice would be appreciated regarding -
1. the best way to transfer stuff from the PPC iMac to the new Intel
iMac and any problems which may arise.
2. partitioning and formatting the external hard drive so that it
can
be used to boot either machine. Will I have to partition the
external
hard drive into 2 partitions, APM for the PPC and GUID for Intel?
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