In my situation, I simply replaced the SCSI2D for the original hard drive. Connect the SCSI2SD (with the microSD card inserted) to the relevant SCSI cable port in the 68k Mac.There are many alternative ways to do this, but what was simplest (and worked!) was the following STEP 2: Initialise the microSD card: This was the first bit where I got confused, and needed advice from the forum, although the solution ended up being very simple! You need to set up the SD card so that it has a valid Apple Partition Map, thus allowing the drive to operate. You also need to assign your SCSI2SD an ID: if, like me this is going to replace the startup HDD, the ID needs to be set to 0. Set the revision to the string "1.0 " (with a space after, for a total of 4 characters).Set the product ID to the string " ST225N" (10 spaces in front for a total of 16 characters).Set the vendor to the string " SEAGATE" (yes, there is a single space in front of SEAGATE for a total of 8 characters) To do this, you need to do the following: Detailed information can be found here, but essentially you need to con the Apple SC HD setup software into believing your SCSI2SD is a valid hard drive. Then, you need to setup the parameters of your SCSI2SD: As far as I can gather, there is no need to change any of the 'General' settings for a 68k Mac, but you do need to change settings in the Device tab for the system you are using.
#Seagate mac format patch update
#Seagate mac format patch install
STEP 1: Install the SCSI2SD-UTIL software: this is available from the SCSI2SD website ( link here). A floppy disk-drive that you can connect to your modern Mac to add some software to a 'Disk Tools 1' floppy disk that is used to start-up the 68k Mac.Basilisk II emulator (actually not really necessary, but handy to have nonetheless).A Floppy Disk of OS 7.5.3 Disk Tools 1, to act as a boot disk for the 68k Mac.A legitimate copy of the OS you are planning to install (I used the freely available System 7.5.3 with 19 1.4mb disk parts (important: these are NOT disk images).A modern Mac that you can install the SCSI2SD-UTIL software onto (the current version only runs on Intel Macs, but I believe that older versions of the software are available).You do need the following (as well as the SCSI2SD and a MicroSD card) Thanks to gadget, rezwits and olePigeon for helping me to get it right over the weekend!Īctually, the process is really quite straight-forwards to get a SCSI2SD working in your old 68k Mac. This has been tried and tested in my Centris 650, but should be broadly applicable to any 68k Mac. Okay, as promised, here is my idiots guide to installing a SCSI2SD to replace a defective HDD.