New 15″ MacBook Pro supports four 4K or two 5K displays simultaneously, 13" more limited
Jeff Benjamin / 9to5Mac :
Context & Ripple Effects
External display support has been an escalating spec race on the Mac for over a year: the 2015 15-inch MacBook Pro was the first MacBook to handle 5K and 4096×2160 4K panels, after OS X 10.10.3 opened the door to single-stream 4K monitors on iMac and Mac Pro. Today's announcement extends that lead — the new 15-inch model now drives four 4K or two 5K displays simultaneously, while the 13-inch is deliberately capped lower.
The timing matters because it lands alongside the LG UltraFine 5K display partnership, giving Apple a $1.3K companion screen tuned for exactly this capability when it ships in December.
First-order effects
- Pro users with multi-monitor workflows can consolidate four 4K panels onto a single 15-inch MacBook Pro, while buyers needing that headroom are pushed up-tier since the 13-inch supports less.
Second-order effects
- LG's UltraFine 5K arrives as the certified companion display for this capability, tying monitor sales to MacBook tier choice and giving display vendors a spec sheet to build against.
Third-order effects
- External display count is hardening into a durable Apple segmentation lever tied to the underlying silicon — a pattern that recurs later in the M1 Pro/M1 Max tiers' differing 6K-display limits.
The trend: Apple increasingly uses external display support as a tier-differentiating spec, segmenting its laptop line by how many high-resolution monitors each model can drive.