Grab's Mac Cloud Exit supercharges macOS CI/CD

Grab migrated its macOS CI/CD infrastructure from a US cloud vendor to a self-owned colocation cluster in Malaysia, achieving major cost and performance gains.

• •The cluster scaled from 1 Mac Pro to 250+ Mac minis supporting multiple iOS apps, including the Grab app with 2.5M+ lines of code
• •Apple's EULA requires a minimum 24-hour lease for macOS instances, making cloud macOS compute roughly 10x more expensive than Linux (per GitHub Actions pricing)
• •Malaysia was selected over Singapore for colocation due to lower energy costs, proximity to Git servers, and strong data center infrastructure
• •Bare-metal Mac minis were chosen over virtualization due to observed performance and stability trade-offs in macOS virtualization environments
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