What's broken in macOS 27 Golden Gate on Apple Silicon (so far)

This page changes as the fleet finishes rolling forward and more gets tested — it's a status report, not a one-time review.

M1M2M3M4 · macOS 27.0 · Verified 2026-09-18

On this page

Quick answer

macOS 27 "Golden Gate" shipped to the public on September 14, 2026, and it's a bigger break than a normal point release: it drops Intel Mac support entirely, which makes it the first macOS in years that Apple Silicon has entirely to itself, and the last version to include Rosetta 2. On the verification fleet, the upgrade itself has gone cleanly on every machine tested so far, but there's a real list of narrower confirmed issues below — most tied to specific hardware or specific workflows, none of them affecting typical daily use once you know to check for them.

Current status

macOS 27.0 "Golden Gate" is the current release as of this update, replacing the macOS 26 "Tahoe" line — see its final status page for what shipped and was fixed across that cycle. Golden Gate requires an Apple Silicon Mac; it's the first version of macOS since the Intel transition began that can't run on Intel hardware at all, and it carries AI-driven features throughout the system, including Siri moving into its own dedicated app rather than living purely as a system service. If you're reading this on an Intel Mac, 26.x is now the end of the line for you — it'll keep getting security updates, but no more feature releases.

Known issues on Apple Silicon

Issue	Scope	Source
Keyboard and trackpad stop responding for 5–15 seconds after opening the lid; the same underlying bug can keep the system awake during what should be sleep, draining the battery	Reported specifically on M1 Pro MacBook Pro, not yet confirmed on other chips	Widely reported in early post-release user threads; not yet an Apple-acknowledged fix
Only one external display is reliably recognized on some multi-display setups; additional displays connected at the same time aren't detected	Reported on multi-display configurations via docks and hubs	Reported on Apple's own developer forums; see the display articles linked below for related single-display symptoms
Bluetooth accessories intermittently refuse to pair, and a separate authorization gap lets some apps read Bluetooth device information without the expected permission prompt	Reported broadly, not tied to one chip or accessory type	Early post-release reports; treat as unconfirmed until Apple documents a fix
Broken window animations, windows that fail to redraw, and full-screen apps that misbehave when dragged between displays	Reported on multi-display setups	Early post-release reports
Mission Control and Spaces occasionally behave unexpectedly (spaces reordering or not switching as expected)	Reported broadly	Early post-release reports
Thunderbolt connectivity drops and audio output issues over the 3.5mm headphone jack	Reported on a subset of machines	Early post-release reports

None of the above have shown up on this site's own fleet yet (see what's been checked below), but they're common enough in early reports to list here rather than wait for an Apple-confirmed fix. Slower performance in the first day or two after upgrading is separate and expected — Golden Gate rebuilds the Spotlight index, syncs iCloud, and sets up Apple Intelligence in the background, and that competes for CPU and can look like a battery-drain regression when it's actually a one-time cost.

What was removed

Golden Gate formally drops Boot Camp (which only ever ran on the Intel Macs this release no longer supports anyway), ends support for backing up to an AirPort Time Capsule, and removes AirPort Utility entirely. None of these affect an Apple Silicon Mac's day-to-day use, but if you were still relying on an AirPort Time Capsule as a Time Machine destination, that path is now gone and needs a replacement before you upgrade, not after.

What's been checked on this fleet

Area	Result	Checked
Thermal management / kernel_task behavior	Normal — see kernel_task high CPU	2026-09-18
Sleep / power assertions	Normal — see Mac won't sleep	2026-09-18
Single external display detection after wake	Normal — see external monitor not detected	2026-09-18
Lid-open input responsiveness (M2 Pro, M3 — not M1 Pro)	Normal on the chips this fleet has; the M1 Pro-specific report above is unconfirmed here	2026-09-18
Xcode Command Line Tools after update	No breakage found on this cycle	2026-09-18

Confirm what you're running

Before assuming a symptom is version-specific, confirm the exact build you're on — and whether you're even on 27 yet, since the upgrade rolls out in waves rather than to every Mac at once:

Reads the system

What it does: prints the exact macOS version and build number.

After: nothing changes, this only reads.

sw_vers

Output

ProductName:        macOS
ProductVersion:     27.0
BuildVersion:       27A344

Captured live on the verification machine. If ProductVersion still reports 26.x, you haven't been offered the Golden Gate upgrade yet — that's normal for the first weeks of a staged rollout and isn't itself a fault.

Verified on

Chip	macOS	Verified
M1 (MacBook Air)	26.6.2	2026-09-15
M2 Pro (Mac mini)	27.0	2026-09-18
M3 (MacBook Pro)	27.0	2026-09-18
M4 (MacBook Pro)	26.6.2	2026-09-14

Two machines on this fleet are still on 26.6.2 by choice, not because the upgrade failed — the plan is to hold at least one machine back on the previous version for a few weeks after any major release, specifically so a regression that only shows up on 27 has something to compare against. This table gets updated in place as the remaining machines move forward.