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These instructions are intended for machines that have had a PCI USB card installed after Mac OS installation has occurred, or one running 9.2 without built-in USB ports. The extensions that come with 9.2 have a bug, causing them to not work on Macs without built-in USB. The card and devices plugged into it will appear in System Profiler but will not function, and do not disappear until the machine is restarted.
In 9.1 you could also run the installer again, select Add/Remove, and add in USB Adapter Card Support. This is located in Mac OS 9.1>Network & Connectivity when doing a customized installation.
You will need
USB PCI 2.0 cards you may want to consider are the Sonnet Allegro USB 2.0, XLR8 USB 1.1 DualPort ($5.00!), and the 5 port ADS USBX-2000 and DLX-180, which has 2 USB 2.0 ports and two FireWire 400 ports. These should all support Macs as far back as the Blue & White Power Mac G3 (and possibly older Macs as well) and Mac OS versions as far back as. Type: PCI Express to M.2 Card; External USB Ports: PCI Express; Compatibility: Apply to 2280 / 2260 / 2242 / 2230mm PCI-e m.2 NVMe SSD (NOT supported B/B+M Key M.2 NGFF SSD) Specifications: Please NOTE: 1. This M.2 PCIe adapter can Only Support M.2 PCI-e Based M Key Nvme SSD, DO NOT support PCI-e M Key AHCI SSD, SATA based B+M key or B Key SSD.
- A Macintosh with a working Mac OS 9.1 or 9.2 installation (See note 1 for prior versions)
- One PCI USB Card that’s OHCI compliant, installed in the Mac. The vast majority of PCI USB 1.1/2.0 cards support OHCI.
- Theoretically any OHCI-compliant card will work, but certain configurations are problematic (See note 2)
- Note that a USB2.0 card will not work at 2.0 speeds as OS8/9 do not support EHCI
- Mac OS 9.1, either a retail CDROM or the 9.1 update
- Insert your OS 9.1 disc or extract the 9.1 update and open the “Installation Tome” file
- This is located in Software Installers/System Software/Mac OS 9.1
- Extract these files from the tome, placing them on your desktop.
- HID Library
- Serial ShimLib
- USB Device Extension
- USB Mass Storage Support
- USB Software Locator
- USB Support
- Skip to step 4 unless you’re running 9.2. You’ll need to remove the preinstalled versions of these files from your Extensions folder (in your System Folder.) Create a folder on your desktop and place them inside.
- Drag the files you extracted onto the System Folder. You should receive a dialog box asking you to confirm placing them in the Extensions folder, click OK. Alternatively you can place the files directly in the Extensions folder.
- Reboot. USB should now be working. You may trash the extensions you removed (if on 9.2)
- Apple provided USB Adapter Card Support 1.4.1 as a separate installer for 8.6-9.0. You may still be able to use the versions extracted from 9.1, however.
- All OHCI cards are supposed to work.
- I’ve had the best luck with NEC, Lucent, and OPTi-based cards. I’d stay away from VIA
- I could not get any USB 2.0 cards to function in a PowerMac 6500. I suspect this might have something to do with PCI 2.2, but I’m not sure. Please comment with your results.
Key Features
Four SuperSpeed USB-A 10Gbps Ports—Adds four USB-A 10Gbps ports to your Mac Pro, Windows PC, or Linux computer with PCIe slots; or Thunderbolt to PCIe card expansion system
Powerful Performance with Dual USB 3.2 Gen 2 Controllers—Support data transfers at up to twice as fast as USB 3.0 and USB 3.1 Gen 1, and boost data transfer speeds between connected drives
Pci Usb Card For Small Form Factor
Powered Ports—Supports USB bus-powered SSD, SSD RAID, and hard drive devices with up to 7.5W power per port
Supports Charge & Sync—Supports USB 3.0 charging port handshake, and will simultaneously sync and charge iPads and other devices that support USB 3.0 charging at 1.5A per device
Protected Power Delivery—Independent power regulation isolates each port to prevent cross-coupled power glitches that may cause accidental disconnects; resettable device overcurrent fuses protect the card and computer, and may be reset by a simple shutdown
4-port Usb 3.0 Pci-e Card For Mac Pro Kt4004
Add USB 3.2 Gen 2 to Thunderbolt Expansion Systems—Add four SuperSpeed USB-A 10Gbps ports to Thunderbolt to PCIe card expansion systems
Easy Installation—Quick and easy user installation into any available PCIe slot
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Broad USB Device Support & Compatibility—Supports storage, hubs, and other USB-IF compliant USB devices