The was a marvel of engineering in 2015—a 2TB NVMe drive crammed into a proprietary blade form factor that delivered 1500 MB/s speeds when most laptops still used SATA. It served professionals well for years.
: High-capacity configurations of the MacBook Pro.
2TB (approximately 1.8 TB usable after formatting). Interface: PCIe 3.0 x4. Protocol: NVMe (Non-Volatile Memory express). apple ssd ap2048n
The is a proprietary solid-state drive module manufactured for Apple, typically by leading NAND flash suppliers like Samsung or Kioxia (formerly Toshiba Memory). The model number follows Apple’s specific naming convention: "AP" denotes Apple Proprietary, and "2048" indicates the storage capacity in gigabytes (2048GB, or 2TB).
and other Intel or Apple Silicon machines of that era. As a 2TB drive, it represents one of the higher-tier storage configurations, offering both significant capacity and high-performance throughput due to its multi-NAND flash architecture. Performance Benchmarks The was a marvel of engineering in 2015—a
But today, it is an aging relic constrained by its custom connector, outdated PCIe 3.0 bus, and finicky driver support in modern macOS. You have three clear paths: live with it while it works, replace it with a cheap adapter plus a modern NVMe drive, or finally retire that old MacBook Pro.
In some Macs (2018+), the SSD is physically separate but cryptographically paired to the T2 chip. If you remove this drive and put it into another Mac, it won't boot unless you disable FileVault and reformat it. In newer T2 Macs (like the 2019 iMac), the controller is actually inside the T2 chip—meaning the "AP2048N" is just raw NAND chips, not a standalone SSD controller. 2TB (approximately 1
The AP2048N is roughly 3x faster than a typical SATA SSD from 2015. Booting macOS Mojave or Catalina feels snappy. Apps launch quickly. 4K video editing over USB-C is possible. However, compared to a modern Gen4 or Gen5 drive, it is woefully outdated—a full 5x slower in sequential transfers.
For its era, the AP2048N was a beast. Let’s put numbers to it. Using Blackmagic Disk Speed Test on a clean Late 2015 15" MacBook Pro: