JMicron Express eSata Card Not working on 10.5.8

Discussion in 'macOS' started by johnpublic, Aug 21, 2009.

  1. johnpublic macrumors newbie

    Aug 2, 2009
    Sacramento, CA
    Since upgrading to 10.5.8, my external WD My Book connected to the MacBook Pro (circa 2006) via a Best Connection JMicron-based express eSATA card has stopped being recognized and listed in the Finder upon boot up.

    1) Has any one else had the same experience?

    2) How does one remedy the problem?

    3) Is it possible to revert back to OS 10.5.7?
  2. johnpublic thread starter macrumors newbie

    Aug 2, 2009
    Sacramento, CA
    Problem Fixed

    Up until 10.5.8, the JMicron-based card was natively supported by the OS. One did not need to download a driver. It appears that now, a driver needs to be downloaded. Went to the JMicron site, under Support ( and downloaded and installed the Mac OS driver. That fixed the problem. The card and the external drive work like a champ again.

    Also note, that with the upgrade from 10.5.7 to 10.5.8, my energy settings were changed back to default. Had to change them so the MacBook Pro never goes to sleep, and UNCHECKED put the drives to sleep when possible.
  3. bulgariuv macrumors newbie

    Jun 22, 2011
    drivers needed

    I serched the jmicron for mac osx 10.6.x drivers but wasn't able to find any.can you be more specific?
    thank you

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