Xcode 26.4
Xcode 26.4 includes Swift 6.3 and SDKs for iOS 26.4, iPadOS 26.4, tvOS 26.4, macOS 26.4, and visionOS 26.4. Xcode 26.4 supports on-device debugging in iOS 15 and later, tvOS 15 and later, watchOS 8 and later, and visionOS. Xcode 26.4 requires a Mac running macOS Tahoe 26.2 or later.
There are lots of improvements for C++. With no more support for Sequoia, I won’t be updating for a while.
New Run Comparison feature allows to compare call trees with other runs using View → Detail Area → Compare With… or the ⇆ button in the jump bar. After selecting which run you want to compare with, the comparison view allows you to view which functions took more or less time between the runs. Call tree filtering operations like “Charge to callers” allow you to focus in on the functions that are faster or slower.
Top Functions is a new, top-level mode of a Call Tree view allowing to quickly identify the most expensive functions in the trace, no matter where they’re called from. To access Top Functions, select rightmost button in the Call Tree navigation bar.
[…]
Swift Testing adds support for specifying a Severity when recording an Issue.
Previously:
Update (2026-03-30): Christian Beer:
So Xcode 26.4 only runs on Tahoe 26.2 or newer… our CI macMini needs to run Xcode 16.2 for older apps but Xcode 16.2 does NOT run on Tahoe!!!
This all sucks so much!!111
After updating to Xcode 26.4, paste from Mac to iOS Simulator is completely broken.
[…]
Write directly to the Simulator’s pasteboard with
simctl:echo -n "your text here" | xcrun simctl pbcopy bootedThis bypasses the broken Mac-to-Simulator auto-sync. Once run, paste works normally inside the Simulator. You still need another
Cmd+Vto paste into simulator.
Update (2026-04-03): Jeff Johnson:
Before and after, Xcode Settings in versions 16 and 26
The damn thing doesn’t even fit on my screen anymore!
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I used to get excited about Apple OS and Xcode betas. These days, I couldn't give a rodent's behind. If rumors are true, and there are no plans to scale back the Glass interface, I might just keep the work Mac (which is forced to update by IT) and just go back to Windows for non-work stuff. All the visual bugs and ugliness just screams at me every time I look at it. The kiddie clowns at Apple will barely touch the macOS, just like they barely iterated on the Big Sur design except for further enshittification.
Windows isn't good, but it irks me a lot less these days than Tahoe does.
I’m torn, Windows is still a nightmare to me, especially with Copilot crammed into everything and users being linked to Microsoft accounts. But Liquid Glass is truly insulting on macOS. I’ve been looking at different Linux distributions as of late, but I’ll wait at least until macOS 27.3 before deciding on anything.
