ALANJOL
(Running El Capitan currently) Want to run LEOPARD as alternative??
iMac, OS X El Capitan (10.11.6), As alternative start up in seperate
You can only run Leopard on an Intel-based Mac, if it originally came with Tiger or Leopard. Typically, the version of OS X on a particular Mac model cannot be earlier than its originally pre-installed OS X.
Why do you want to run Leopard?
Hi Kenichi
Thanks for your reply! I am running an intel- based Mac Originally it was probably Tiger and then I U/G to
OSX10.6.8 before I U/G to El capitan!!
Unfortunately I had CS6 etc. installed which the NEW OS won't allow me to open as it is saying they are PC
based softwares!
I have a OSX10.5 start up disc & I have seen in SET up that I can choose this OS selected without losing the current
OS if it is located in an external drive????
I am told Portioning is NOT the way to go???
ALANJOL
If it originally came with Tiger, it can run Leopard.
Unfortunately I had CS6 etc. installed which the NEW OS won't allow me to open as it is saying they are PC based softwares!
I think you mean PowerPC. Macs used PowerPC processors until the switch to Intel, which happen during the Tiger to Leopard timeframe. If you have a Snow Leopard installation disc, which you probably used to upgrade to 10.6.8, you can run Snow Leopard instead of going all the way back to Leopard. Snow Leopard can run PowerPC-based software like your CS6 software. After Snow Leopard (starting with Lion), PowerPC-based software can no longer run on Intel-based Macs.
If your Leopard (or Snow Leopard) startup disk is installed on an external drive, you can start up from it by choosing it in System Preference Startup Disk pane, and clicking Restart. Data on your internal drive is not affected. To change back, go to System Preferences Startup Disk pane again, and choose the El Capitan startup disk on your internal drive.
Thank you again Kenichi!!
That is good info. I gather I do not have too save any APPS. or files in doing this before switching OS's & if
I OPEN CS6 and save any files I have done I simply save them in the Ext. drive before
converting back to El Capitan??
ALANJOL
Kenichi
I have opened up about My Mac & have found it is a 3.2GHZ Intel Core i3
Does that change matters??
ALANJOL
Yes, you need to save your files before restarting the Mac. Where you save the files is up to you.
I have opened up about My Mac & have found it is a 3.2GHZ Intel Core i3
If that's your iMac, I don't think it originally ran Tiger or Leopard. This is a list of all iMac models
http://www.everymac.com/systems/apple/imac/index-imac.html
The earliest "3.2GHZ Intel Core i3" I see is from mid-2010. Find your particular iMac model on the list and click it to see its detailed profile page. Find what it says for Pre-Installed MacOS. That's the earliest version of OS X it can run. The iMac I'm looking at says that's 10.6.3, which is Snow Leopard. So, if you install Snow Leopard on external drive that is 10.6.3 or later (10.6.8 is last version of Snow Leopard), that iMac should start up from it. But not Leopard, because all versions of Leopard are earlier than Snow Leopard.
NOTE: PowerPC-based software can still run under Snow Leopard.
Kenichi
Thanks again It is Mid 2010 and that OS sounds familiar.
I will try everything you have suggested.
I will let you know my results after that.
Thanks again
ALANJOL
Hello Kenichi
I am writing to you again as you were very knowledgable!
Since I last wrote to u I have bought a OSx Snow Leopard installer on a USB stick from a Ebay
supplier!!
I cleared & partioned my Toshiba external drive. Even though I cleared the drive of all folders one half
of the drive said there was 292 Gb used (Other)
I installed the Usb stick holding down "F" as the apple logo came up.
Following the instructions I released "F" and selected the TOSHIBA drive, but the instructions said look for "Disk Utilities"& select your hard drive??
Unfortunately all I then saw was a grey screen with no apple Logo???
Could the USB be faulty as I did see the OSX on the desktop when looking at in El Capitan??
Could it be El is not allowing and older OSX too be installed even though I am trying to put it in an ext. Drive?
I would appreciate your thoughts!!
ALANJOL
The only legal source for Snow Leopard is from Apple, on a retail installation disc. Apple still sells it from $20 (I thought you already had one)
http://www.apple.com/shop/product/MC573Z/A/mac-os-x-106-snow-leopard
After getting the official disc, you can create your own USB flash drive with bootable installer, if you need one (instead of using the actual disc directly in your Mac's optical drive). But I would not trust a source on eBay. They could potentially add malware to the installer.
I'm not familiar with using a USB flash drive to run Mac OS X installation. There should be no problem with selecting an external drive as the target, when starting up from standard installation disc. El Capitan does not matter, if the target external drive is erased.
Unfortunately all I then saw was a grey screen with no apple Logo???
As noted in previous reply, the originally pre-installed Mac OS for your iMac is important. It seems like your iMac originally came with Snow Leopard; it shipped with an installation disc for Snow Leopard. If that pre-installed version is 10.6.3 (for example), the version of Snow Leopard on the installer cannot be earlier than 10.6.3. So, if the installer you have is for the original Snow Leopard release (version 10.6 dot nothing), you can't use it on an iMac that original came with 10.6.3. That may your problem.
I am pretty sure it had 10.6.3 installed & I don't have a disc for that! I u/g from the web site to 10.6.8
and did not purchase a disc! I did not realise I could get a disc from Apple! I have been in previously and they have
said it is not available?? At that price I would certainly be interested!!
Also are their any Mac approved DVD burners available of El Capitan???
Also are their any Mac approved DVD burners available of El Capitan???
Recent Macs can use standard USB optical drives. OWC sells some
(Running El Capitan currently) Want to run LEOPARD as alternative??
