Can someone post a step by step on how I can run Snow Leopard on Yosemite?

Discussion in 'OS X Yosemite (10.10)' started by Toddorndorff890, Jan 14, 2015.

  1. Toddorndorff890 macrumors newbie

    Joined:
    Jan 13, 2015
    #1
    So I have something that requires PPC and I was just wondering the easiest hassle free way of running Snow Leopard on my mac that has Yosemite. I've heard and read a little bit about Parallels/Vmware and stuff like that, just never used anything like that. So I couldn't begin to even start doing it. If anyone could post a step by step and maybe even some links as to how I can go about this I would really really appreciate it. Thanks guys! :D
     
  2. Sandman619 macrumors newbie

    Sandman619

    Joined:
    Aug 7, 2007
    Location:
    San Diego, CA
    #2
    Mac Specs ?

    First, have you verified that your computer can run Snow Leopard ? What model of Mac are you using ?

     
  3. GeoFan49 macrumors member

    GeoFan49

    Joined:
    Mar 3, 2012
    Location:
    Silicon Valley, SF Bay Area, California, USA
    #3
    Just set aside a small partition (say 50 ~ 60 GB) for running Snow Leopard and the apps that you need to run with SL. That is a solution that I am using now.

    I even have a 64 GB SD card that boots my MacBook Pro nicely into Snow Leopard. A USB Flash Drive would work as well.

    When you need an old app, just re-boot into the SL partition for awhile.
     
  4. Sirious macrumors 65816

    Sirious

    Joined:
    Jan 2, 2013
    Location:
    United Kingdom
    #4
    Am I right in understanding that you can install OS X to an SD card and then boot from it when needed?
     
  5. vista980622 macrumors 6502

    Joined:
    Aug 2, 2012
    #5
    From an external SD card reader, it will boot but runs very slowly...
    But if you're using the built-in SD card reader, it probably won't boot.
     
  6. Sirious macrumors 65816

    Sirious

    Joined:
    Jan 2, 2013
    Location:
    United Kingdom
    #6
    Thanks for that information. I'm keen on giving it a try with Lion, for old times sake ;)
     
  7. GeoFan49, Jan 25, 2015
    Last edited: Jan 25, 2015

    GeoFan49 macrumors member

    GeoFan49

    Joined:
    Mar 3, 2012
    Location:
    Silicon Valley, SF Bay Area, California, USA
    #7
    Booting from an SD memory card? SDHC, SDXC 32GB or 64 GB... beware!

    I have a SanDisk 32GB SD card (bought at Costco about 6 months ago to use with a camera for making home movies) that is rated at 80MB/sec. My 7200 RPM hard drive is rated at 480MB/sec but never delivers anything over 50MB/sec when connected externally via USB.

    The SanDisk hi-speed SDHC will boot Yosemite 10.10.1 in about 3 minutes. The 7200 RPM hard drive (external USB) takes 2 minutes to boot the same environment. The SD card is plugged into the slot on the side of my MacBook Pro (2009 vintage.) The USB Hard Drive is plugged into the USB socket on the side of the MacBook Pro. The same 7200 RPM USB hard drive will boot Snow Leopard 10.6.8 in under a minute as an external boot drive.

    I got an off-brand "high speed" SDXC 64 GB card, and it took more than 5 minutes to boot the SAME cloned 20 GB Yosemite partition.

    EDIT: Flash memory technology is a very different animal from SSD memory technology. The electrons spin in different directions (j/k LOL) but yes, the performance of SD card vs. SSD will always be a disadvantage. For a temporary, spare, extra boot environment SOME SD memory cards may be okay, some not. Be prepared to take a few hours to test it and you may need to take it back if it is too slow.

    The 64 GB SDXC took about SIX hours to fully ERASE. The 32 GB SDHC took less than ONE hour to fully erase.

    If you want good SD memory card performance — for a spare boot up environment — be sure your SD memory card is rated at 80MB/s or better, and even then you may be disappointed, depending on the manufacturer and the firmware and performance of the specific memory chip. One mfgr. rated at 50MB/s does not even come close to half the performance of another mfgr. rated at 80 MB/s. YMMV.
     

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