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  1. #1

    Member Since
    Feb 24, 2014
    Iomega zip 100 Plus connection to iMac
    Ext zip drive has a SCSI interface. Connected a SCSI to USB adapter cable to 27 iMac, but the iMac doesn't recognize the drive. I verified the drive operational by connecting it directly to an old OS9 Mac (SCSI to SCSI). Solution???

  2. #2

    pigoo3's Avatar
    Member Since
    May 20, 2008
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.8.5
    I believe that you probably need some sort of driver (software) for the system to recognize the Zip drive. And I'm guessing that it has probably been a while since a driver for a Zip drive has been compatible with the Mac OS.

    What Mac computer model & OS version was the last one used with the Zip drive where the Zip drive worked?

    Quote Originally Posted by JCBenson View Post
    I verified the drive operational by connecting it directly to an old OS9 Mac (SCSI to SCSI).
    Remember…the last Macintosh computer that came with a built-in SCSI port was probably around 1998 or older. That's 16 years ago…or 2000 years in "computer years"!

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  3. #3

    Slydude's Avatar
    Member Since
    Nov 15, 2009
    North Louisiana, USA
    2.8 GHz 2008 MacBook Pro 10.11, 8 GB mem, iPhone 8+, 2015 iMac 16 GB 10.13 beta
    IIRC several of those USB to SCSI adapters did not work well with OS X due to driver issues as Nick mentioned. The ones I am thinking of were made by Adaptec I think.
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  4. #4

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Keller, Texas
    2017 27" iMac, 10.5" iPad Pro, iPhone 6s+, iPhone 7+, Numerous iPods, High Sierra
    That's right, Adaptec made several series of SCSI cards back in the 90s and up thru the early 2000s. The last Adaptec card I had included a BIOS that you could optionally change setup for during boot up. That was for a PC not Mac.

    Some of the best and fastest PC motherboards that were being sold during those years included a built in Adaptec SCSI chip. Tom probably remembers those since he's been building PCs for awhile.

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