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About Our Options

Option # 1: OS pre-installed MicroSD card /10 USD

SD card with Mac boot system installed. Formatted with exFAT, you can choose System 7.1 or 7.5.


About BlueSCSI V2

Learn about BlueSCSI V2



Blue SCSI is a small device for SCSI hard disks that uses an SD card. This product is a genuine product licensed by Eric Helgeson.

BlueSCSI is an open source, open hardware, and open design SCSI solution for vintage computers. It is built by the community of creators, not knockoffs or cloners. Please note that sellers who are not listed in the above link will be deleted above.

Our Blue SCSI is manufactured under the same conditions as other distributors, the only difference is Assembled in Japan. Soldered by a craftsman who has been soldering for 30 years, inspections were performed three times after the program, after soldering the pin header, and after completion.


Option #2


Raspberry Pi Pico Standerd, or Wi-Fi model.

The Wi-Fi model is a beta version, so it is not very recommended. There is no support other than storage function. Please use at your own risk.


How BlueSCSI V2 Works

It is a reliable and reasonable method to solve the difficulty of obtaining used hard disks, which is a weak point of 68K Mac. It operates with low power consumption and can operate only with SCSI bus power. It is also recommended for models with insufficient current in expansion cards. The speed is faster than BlueSCSI V1, over 10MB/s, and we have included a lot of functions, including functions that have never existed before.

BlueSCSI V2 is not a method like SCSI2SD, but uses a MicroSD card with the extension .hda or .dsk image files. When backing up with the current PC, it is convenient because it can be handled as one file. A maximum of 7 volumes can be mounted on the disk image, but since SCSI-ID is assigned, it is assigned to a SCSI-recognizable ID (0 to 6 * Old Mac 7 is used by the SCSI bus controller and cannot be used). It also supports CD-ROM (DVD-ROM) images. The extension supports .iso .bin .toast.

Confirmed compatible models: SE / 30, Classic, Classic II, IIci, Color Classic (II), LC I / II / III, LC 475, LC 575, PM 6100, PM8600/9600 and more…


Conditional operating model:

Plus (* 1), IIsi (* 1)


* 1 External power supply required (via USB or FDD power supply 4-pin connection), PLUS can install a non-mounted diode on the logic board and supply 5V to the SCSI connector.

Product Summary

Blue SCSI board and mounter set. The only other thing to prepare is a MicroSD card. Class 10 8GB is recommended. Format with exFat or FAT32 MBR, and after formatting, place the HDA format disk image file in the root directory of the SD card. At this time, the file name should be "HD50_512.hda" or "HD50_512.dsk. "HD" is recognized as a hard disk when viewed from Blue SCSI, the next "50" is the SCSI-ID at the beginning of the second digit, and any number from 0 to 6 is placed, and the first digit 0 is SCSI-LAN. -ID is usually set to 0. Next to the underscore, "512" is the sector size.

The completed file can be edited with an emulator such as Sheep Shaver. If the environment can start the installer on an actual Mac, the installation work will be done on a Mac.


Once started, LOG.txt can be created as the root, so you can follow up when an error occurs.


The Youtube video below is perfect for a better understanding of Blue SCSI setup with Windows:

Notes for the Emulators: SheepShaver supports .hda and .dsk files,  MacOS version Basilisk II supports .dsk (Win version supports .dsk and .hda both), Mini vMac supports .dsk. 
They can be used with BlueSCSI as they are after editing.

BlueSCSI V2 DeskTop

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