Iomega zip 100 Plus connection to iMac

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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???
 

pigoo3

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2017 15" MBP, 16gig ram, 1TB SSD, OS 10.15
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?

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"!;)

- Nick
 

Slydude

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M1 MacMini 16 GB - Ventura, iPhone 14 Pro Max, 2015 iMac 16 GB Monterey
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.
 

chscag

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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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