Typically installng means running on the machine you got the disk for.
So you have to start the iMac up in Target disk mode, connect to the
MacBook Pro as a firewire disk, and then install by booting the MBP from
the DVD.
I repeat something I said a while ago, that running an older Mac with an
SSD as an *external* back up is remarkably successful. My son had a Mac
Mini (2010) which was unusable but still runs effortlessly thanks to an
external enclosure with an SSD.
That's preferable as a) it's much easier b) your software doesn't have
to be out of date.
I set theirs up to clone the external disk to the internal one daily so
there was always a start-up if the external disk got disconnected.
On 19 Apr 2016, at 9:01, mac98aop wrote:
Hi there
The old iMac we were donated is on Yosemite and slow to the point of
impossible to use. Alas, it's come with no original discs etc.
My MacBook Pro came with OSX Lion I believe - can I clean install with
that
DVD?
Or, is there anyway of getting an older OS on the iMac? My MacBook
runs
Mavericks, could I somehow clone it on to the iMac perhaps, USB to
USB?!?!
We just need it for simple surfing and the children doing very basic
primary school assignments. Alas, homework books and a pencil seem a
thing
of the past!
Thanks
Adam
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