Apple PCC summarizes 80K transcripts without keeping session data

Part 2 · How Apple Summarizes 80K Transcripts Without Keeping Your Data 🎙️

When a transcript outgrows on-device memory, Apple’s Private Cloud Compute acts as a secure digital courier.

How the hybrid architecture works:

📦 The Courier: Large 80,000-character sessions enter the cloud as encrypted transcript payloads.

🔒 The Enclave: Summary processing runs inside isolated server enclaves.

🔄 The Clear: Once the summary returns, session artifacts erase from the pass.

📈 The Implementation: This powers CoreRecord for Mac; raw meeting audio stays on local hardware.

🔗 Read the full macOS Private Cloud Compute architectural breakdown.