Downgrade to Yosemite on new iMacs?

Discussion in 'iMac' started by toastboy, Oct 23, 2015.

  1. toastboy macrumors member

    Jul 31, 2007
    Scotland, Glasgow
    Hi all,

    just wondering if anyone has tried this. Waiting for New iMac to arrive and some software I use is not compatible with El Capitan yet.

  2. mikeboss macrumors 65816


    Aug 13, 2009
    not possible, it will not work. Yosemite has no support for Skylake. USB ports will not work a full speed.
  3. codger macrumors member

    Oct 15, 2015
    Cobham, England
    This is a problem for me and others too. My printer and scanner will have to be replaced, altho OK for Yosemite, no good for El Cap.
  4. toastboy thread starter macrumors member

    Jul 31, 2007
    Scotland, Glasgow
    Yeah thanks, thought as much.

    For me it would mean installing Windows 7 on bootcamp then. Just need to buy a copy now
  5. trayloader macrumors member

    Sep 13, 2007
    Same Problem for me.
    Apples update cycle is becoming ridiculous.
    All the third parties aren´t able to follow track, so more and more stuff gets unnecessary obsolete.

    How about installing the relevant KEXT extensions from Yosemite (USB in this case)?

  6. maflynn Moderator


    Staff Member

    May 3, 2009
    Possible but it may cause more problems then you're trying to address.
  7. Chupa Chupa macrumors G5

    Chupa Chupa

    Jul 16, 2002
    How old is your printer and scanner? I have a laser printer that's 8 years old and is still supported by Brother. When you say these don't work has the manufacturer definitively said they will not supply drivers for them or are they just late?

    There is 3rd party software if there is something unique about your printer and scanner that you want to keep them. Check out and Gimp print is freeware, silverfast (scanner) and it's companion PrinTao8 is traditional for pay.

    If your printer and scanner are just run of the milll varieties then these are very inexpensive these days and an upgrade is worth the price of admission. Good laser and scanners are in the $100-200 range. If you only need a "good" scanner Brother AIO laser/scanners/copiers/fax are $250.

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6 October 23, 2015