The 2019 iMac Retina 27-inch (Model A2115 – EMC 3194) supports PCIe NVMe SSDs via blade-style connectors, offering read/write speeds up to 3000MB/s.
Whether the unit shipped with a Fusion Drive, traditional HDD, or native SSD, upgrading to a 1TB SSD significantly boosts system performance and responsiveness.
The upgrade requires removal of the LCD panel using specialized tools and resealing the display using precision adhesive strips.
Compatible SSDs include Apple OEM modules or M.2 NVMe drives with Sintech adapter boards.
The replacement should be followed by a fresh macOS installation and verification of EFI boot volume configuration.
Installation typically takes 1.5–2 hours and should be performed by a qualified technician to avoid display or logic board damage.