Macintosh SE upgrades

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 SE. Choose the internal 50-pin or external DB-25 form factor for the intended installation.

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.

Turns a spare compact-Mac logic board into a small desktop computer with modern power, display, and storage hardware.

For this system (exact model): JCM sells an SE/SE30 enclosure and GutBomb includes the SE in the printable design. MacPicoVid/SE-COMBO is one documented power-and-video path.

On 2026-07-24 JCM showed 5 printed 128K/512K cases, 3 Plus cases, 2 SE/SE30 cases, and 5 Classic/Classic II cases in stock. This is an enclosure, not a complete computer: supply a working logic board, power and video electronics, storage, input devices, display, cabling, and other desired parts. GutBomb's printable design is CC BY-NC-SA and does not cover the separate electronics.

Replaces missing or broken case-mounted programmer's switches on compact Macintosh computers.

For this system (exact model): The transparent MacEffects variant explicitly supports the Macintosh SE and provides reset and programmer/debug access. It is separate from the Greeny-switch for earlier compact Macs.

Both product pages said Sold out or Out of Stock on 2026-07-27. The Greeny-switch resin can break if excessive force is applied. Choose the model-specific variant; neither seller establishes cross-family interchangeability between the early compact-Mac and SE-family switch assemblies.

Uses an SD card to emulate Apple floppy drives and, on supported systems, HD20 or SmartPort hard disks.

For this system (stated family): The manual covers classic Macintosh systems in this generation. Install the Macintosh/Lisa firmware, connect through DB-19 or the documented internal header, and choose a floppy or HD20 image mode supported by the host.

The BMOW store showed the assembled Model C sold out at $109 on 2026-07-27. The separate Deluxe bundle is the same emulator packaged with accessories rather than a different product family. Check the direct product page for a restock.

Breaks out compact Macintosh power rails and video signals for custom logic-board projects.

For this system (exact model): Exposes the SE logic board's J12 power and video connections for CatMac-style or test-bench use. It requires separate power wiring and compatible external video hardware.

JCM showed 17 SE/SE30 units and 6 Classic/Classic II units in stock on 2026-07-24. These are custom conversion and test-bench parts, not drop-in upgrades for intact computers. The two Macintosh groups use different J12 signal mappings, so use only the version intended for the installed logic board. JCM recommends 16 or 18 gauge leads with a modern ATX supply on the SE-family board.

Replacement compact-Mac fan rated at 24 CFM, approximately twice the airflow MacEffects attributes to the stock fan.

For this system (exact model): The product title explicitly names the Macintosh SE and includes an internal four-pin Molex power adapter. The seller describes fit in its clear case.

The MacEffects page said Sold out on 2026-07-27. The title names the Macintosh SE and SE/30, but the detailed fit claim is framed around MacEffects clear cases; confirm mounting and noise expectations before using it in an original enclosure.

Replaces the internal speaker in a Macintosh SE or SE/30 with a functional nickel-plated unit using a transparent cone.

For this system (exact model): The seller explicitly identifies the speaker as a functional Macintosh SE replacement. Confirm its mounting and electrical details before installation.

The product page said Sold out on 2026-07-27. The seller does not publish impedance, power rating, dimensions, connector details, or installation instructions, so confirm those details before substituting it in an original enclosure.

New replacement for the analog-board to logic-board signal cable in four compact Macintosh models.

For this system (exact model): Replacement analog-to-logic-board cable for an SE. Use only with the matching SE-family board set; do not connect it to Classic-family parts.

The JCM page showed 17 units in stock on 2026-07-24. Never use the cable to combine an SE or SE/30 board with a Classic or Classic II board: the identical-looking connectors carry signals on different pins, and mixing the two groups will damage the computers.

Provides a newly manufactured bare replacement PCB for rebuilding a damaged Macintosh SE logic board.

For this system (exact model): The PCB is explicitly a Macintosh SE logic-board replacement. It must be fully populated, assembled, inspected, and tested before installation.

The authorized bare PCB was sold out on 2026-07-27. It includes no populated components and is an advanced board-level rebuild. The best public follow-up found was a maker-authored TinkerDifferent discussion, but no complete official BOM, placement package, donor-chip list, supported original-board revisions, or tested bring-up procedure was established.

Converts raw compact-Mac video to VGA, with optional power integration for bare logic-board projects.

For this system (exact model): Standalone MacPicoVid accepts the SE's raw video signals. SE-COMBO and SE-TOPPER use J12 for a removed-board CatMac or test setup; MacPicoVid produces VGA, while IDC12 requires a separate compatible TTL scaler and ATX power setup.

On 2026-07-24 JCM showed 11 onboard-VGA and 41 Extended MacPicoVid boards, 56 MacPicoVid SE-COMBO boards, 2 IDC12 boards, 19 SE-TOPPER boards, 46 128K/512K/Plus adapters, and 32 Classic adapters in stock. Standalone boards require separate 5 V USB power and host wiring. The power-integrated products are for a removed logic board or custom chassis, not a drop-in external-video port for an intact computer.

Upgrades compact Macintosh computers with a 16 MHz 68030 and optional 68882 FPU through original vintage cards or modern recreations.

For this system (exact model): The original and modern Performer cards install in the Macintosh SE PDS, and modern operation is tested. U7 is not needed; when U7 is omitted, SJ2 must be closed. MacEffects says to install Performer 2.2.1 software before the card; it lists System 6.0.7, 6.0.8, 7.1, and 7.5.x, treats 7.0 as conditional, and warns that timing-sensitive games can show audio or behavior problems.

The open clone remains buildable, but MacEffects' assembled Macintosh SE variant was sold out on 2026-07-27. The original MicroMac page was last modified in 1998, so its order form and prices are archival rather than a current purchase path. Modern-clone operation has been tested in the Macintosh Plus and SE, but not in the Classic; no secure socket has been found for the Classic's PLCC CPU. Host-specific U7 and SJ2 settings are mandatory. GAL16V8-15 and PALCE16V8-15 parts are tested, while ATF16V8 and other speeds are not.

Open, reversible Pico ATX power-adapter family for the Macintosh 128K, 512K, Plus, SE, and SE/30.

For this system (exact model): The SE adapter replaces the original removable PSU module while retaining the analog board. Use a quality PicoPSU and sufficiently rated 12 V brick, do not bypass its fuses, perform the documented short and rail-voltage checks, align the analog-board connector correctly, and observe CRT high-voltage precautions.

On 2026-07-27, the 128K/512K/Plus listing showed order controls at $29.99 and the SE/SE30 listing showed order controls at $34.99. Both offered kit and assembled choices. Their United States shipping sections simultaneously displayed rates and a does-not-ship warning, so confirm destination availability at checkout. A suitable PicoPSU and adequately rated 12 V center-positive power brick are separate parts.

Connects modern USB HID keyboards and mice to Macintosh computers through Apple Desktop Bus.

For this system (bus/interface): The SE provides Apple Desktop Bus for its keyboard and mouse, and Rabbit Hole specifies QuokkADB for any ADB-equipped Macintosh. The optional power button applies only to Macs that support ADB soft power.

HIDHopper Base, Base with USB Hub Hat, and Hub Hat-only selections could be added to the JCM cart on 2026-07-24. The assembled QuokkADB Rev. 2022g remained sold out, while its Raspberry Pi Pico Community Edition remained buildable. HIDHopper's Hub Hat requires external USB-C power, must be power-cycled between Macintosh starts, and can otherwise exceed the host's ADB power budget.

Mounts a BlueSCSI or another 50-pin SCSI device directly above a Macintosh internal SCSI connector.

For this system (exact model): The open project explicitly lists the Macintosh SE. Verify internal clearance and connector orientation for the chosen SCSI device.

The current store page listed partly assembled and complete options without an out-of-stock marker on 2026-07-24. The maker repository also provides assembly material and Gerbers.

Provides new bare analog and neck-board PCBs for rebuilding a Macintosh SE display and power assembly.

For this system (exact model): The project is explicitly a 1:1 replacement for the Macintosh SE analog board. It requires component transfer, full assembly, inspection, and safe high-voltage testing.

The product page offered Add to Cart on 2026-07-24. The listing supplies only bare analog and neck PCBs. There are no assembly or soldering instructions, and the vendor assumes expert high-voltage experience. CRT and mains circuitry can retain lethal voltage; this is not a beginner repair.

Adapts a later PLCC44 SWIM floppy controller to the DIP28 socket in an early Macintosh SE.

For this system (exact model): For an early Macintosh SE with a DIP28 IWM socket. The conversion also needs a compatible PLCC44 SWIM chip and FDHD-compatible ROMs; the ROM option requires the buyer to perform the documented pin modification.

The current storefront listed the adapter and optional refurbished SWIM chip without an out-of-stock marker on 2026-07-24. The optional FDHD ROM pair requires a manual pin modification and is not recommended for beginners.

Modern replacement power-supply boards for Macintosh SE and SE/30 Apple, Sony, and ASTEC enclosures, with assembled, DIY, Pico ATX, and separated-rail options.

For this system (exact model): Designed for Macintosh SE power-supply enclosures made by Apple, Sony, or ASTEC. Match the listing configuration to the original enclosure. The enclosure is not included, and ASTEC installation can require cutting and stripping the original AC wiring. DIY AC/DC assembly involves mains voltage and should be built and tested only by someone qualified for that work.

On 2026-07-27, the DIY AC/DC board was $22 with four left, the assembled and DIY Pico ATX boards were $89.99 and $16.99 with two left each, and 4XDC was $170 with two left. The $129 assembled universal AC/DC board had been sold out since May 27, 2026. Check the selected architecture, PSU-enclosure variant, parts included, and destination availability before ordering.

Breaks out compact Macintosh internal TTL video for an RGBtoHDMI or another compatible digital scaler.

For this system (exact model): The product page explicitly names the Macintosh SE. Installation uses internal analog-board video signals and requires a compatible external scaler.

JCM showed 11 units in stock on 2026-07-24. This is not a standalone HDMI adapter: it requires a compatible digital-TTL scaler and installation wiring. The onboard buffer is intended to protect the scaler from analog-board high voltage.

Open-firmware SCSI emulators in DB-25, internal 50-pin, laptop, and Wide SCSI form factors.

For this system (bus/interface): The product is designed for direct attachment to a DB25 SCSI port, and the SE provides external DB25 SCSI. The maker says TinySCSI fits flush on compact Macs. A Pico Slim must be the final device because its termination cannot be disabled.

Rabbit Hole Computing offered current Compact RP2040, Blaster, and Wide variants on 2026-07-24. A 2026-07-27 follow-up found its mostly assembled $25 Pico Slim V1.3 PCB kit sold out, while SamplerZone exposed an Add to Cart path for a $79.95 assembled and cased Pico Slim with configured microSD media. Rabbit Hole's direct Pico2 Slim and Laptop Blaster pages were also sold out. TinySCSI was archived in January 2025, but its V1.0 and V2.0 KiCad files remain available for personal builds. A project discussion documents Wi-Fi DaynaPORT operation on a Pico Slim under System 7.5.5 with the DaynaPORT SCSI-port driver, but does not establish a minimum System version or equivalent networking support for every family variant. Connector, termination, power, speed, and initiator support vary by hardware.