Corsair Mac Memory 32GB (2x16GB) DDR4-2666 CL18 SO-DIMM Memory Kit, 260-pin, 1.2V, for iMac and Mac mini

The Corsair Mac Memory 32GB (2x16GB) is a DDR4-2666 CL18 DDR4 SO-DIMM memory kit for Intel-based iMac and Mac mini models with user-accessible SO-DIMM slots. It ships as two identical 16GB modules, so a laptop with two memory slots runs in dual-channel mode straight away.

Corsair Mac Memory is lab-tested by Corsair for Mac compatibility and uses the standard SPD profile, so macOS reads and configures it automatically — there is no BIOS or XMP step on a Mac. At DDR4-2666 each module moves up to 21.3 GB/s, and the pair together doubles that in dual-channel.

Before you buy, three things decide whether a memory upgrade works: the memory generation (this is DDR4 — not DDR3 or DDR5), the form factor (SO-DIMM, the short 260-pin laptop module) and how much your system accepts per slot and in total. Speed and latency come after that: a faster module never hurts, because it steps down to whatever the platform runs, but it only helps if the system can use it. If you are replacing a module rather than adding one, note the capacity and speed of what is fitted now — Windows Task Manager (Performance, then Memory) shows the speed in use, the number of slots and how many are occupied.

• 2 × 16GB DDR4 SO-DIMM modules (32GB in total)
• Manufacturer packaging
• No tools, cables or software — none are needed; most laptops only require a small screwdriver to open the memory cover

• Install one module per slot to get dual-channel bandwidth; using only one of the pair halves the memory bandwidth.
• The module runs at the lower of its rated speed and the speed your platform supports — on a DDR4-2400 or 2666 Mac it will simply run at 2400 or 2666.
• 32GB comfortably covers heavy multitasking, large spreadsheets, virtual machines and photo or video editing on a Mac.
• Mixing it with a different existing module usually works, but the system will fall back to the slowest speed and loosest timings of the two — a matched set avoids surprises.
• Fitting it is a five-minute job on most Macs with a memory cover; we can also install it for you at our Limassol store.
• Handle the module by its edges and touch a metal surface first; insert it at about 30 degrees, fully into the slot, then press down until the side clips lock.
• The operating system detects the new memory automatically — there are no drivers to install. The first start after a memory change can take a little longer while the system trains the memory.
• If the Mac has soldered memory plus one free slot, the module adds to the soldered memory; dual-channel then works best when the two capacities match.

• Desktop PCs with full-size DIMM slots — this is a 260-pin SO-DIMM and does not fit a desktop slot.
• DDR3, DDR3L or DDR5 laptops — the notch position is different and the module will not seat.
• Laptops, tablets and ultrabooks with fully soldered memory, including Apple silicon Macs.
• Servers and workstations that require ECC or registered (RDIMM) memory.
• MacBook and MacBook Pro models — Corsair Mac Memory SO-DIMMs are for Macs with SO-DIMM slots, not for notebooks with built-in memory.