Macintosh IIci upgrades

Single 16 MB, 60 ns, non-parity fast-page-mode SIMM for specifically listed 30-pin Macintosh systems.

For this system (exact model): The seller explicitly lists the Macintosh IIci and requires four modules for Macintosh use. Confirm bank population and the intended total memory configuration.

The Artmix product page reported out of stock on 2026-07-24. Check the direct page for a restock and confirm the exact computer's ROM, addressing, bank-population, and clearance requirements.

Open hardware SCSI emulator with SD-backed storage, optional Wi-Fi networking, and host-side management tools.

For this system (exact model): The official compatibility list names the Macintosh IIci.

Current seller checks on 2026-07-27 found a $39 internal 50-pin Pico 2 W kit, a $49 assembled external DB-25 model, a $49 PowerBook model, and a $59 assembled Ultra Narrow 50-pin model at authorized seller ToTs RETRO. JCM also carried assembled Ultra hardware and model-specific Macintosh adapters. Prices, stock, included media, and support differ by seller. Ultra models require Berg or Molex power and cannot run from SCSI termination power. The initial Ultra hardware release is not yet open hardware, although its firmware remains GPL; the project says hardware licensing will open later.

Open 64-pin ROM SIMM with selectable 32-bit-clean System 6 and System 7.1 ROM disks for six 68030 Macintosh models.

For this system (exact model): The IIci is explicitly supported. Use either custom image or the unmodified IIsi ROM; the supplied unmodified IIx ROM is not compatible with this model.

The assembled Tindie module was out of stock on 2026-07-24 and had been sold out since May 7, 2025. Hardware, software, and fabrication files remain public. Most tested 68030 accelerators work, but some 68040 accelerators do not; select the stock IIsi or IIx ROM when the custom image is incompatible. Only 8 MB of the 16 MB flash can be selected at once, with the computer powered off before changing the switch.

DIY 4 MB 30-pin Macintosh memory module made by transplanting DRAM from a compatible 16 MB 72-pin SIMM.

For this system (exact model): The IIci is explicitly named. The module is an advanced soldering project, not a plug-and-play conversion of the whole donor SIMM.

The current store listed the bare kit and optional passive-component set without an out-of-stock marker on 2026-07-24. Compatible donor DRAM is not included.

Provides a programmable 2 MB Macintosh ROM SIMM using four socketed PLCC32 flash chips.

For this system (exact model): The IIci is explicitly named. ROM preparation and any boot-disk image are the user's responsibility.

The current page offered populated and chipless versions in multiple PCB colors on 2026-07-24. Its dated notice says the red PCB alone was out of stock on 2026-04-26, with black and purple also listed.

Replaces the ball mechanism in an original Apple ADB Mouse or ADB Mouse II with an adjustable optical sensor while retaining the ADB interface.

For this system (exact model): TT Design explicitly tested the optical board on a Macintosh IIci. Use only a supported original ADB Mouse or Mouse II shell and retain its ADB cable.

Both $72.99 variants were out of stock on 2026-07-27: the Mouse II board since May 25 and the original wedge board since July 18. Match the replacement to the exact shell and board shape before ordering. The original ADB cable is required, and installation may require moving its four wires or connector. The USB-C connector changes settings and firmware; it does not turn the mouse into a USB device.