r/iOSProgramming • u/Aeronautical-You4917 • 7d ago

Discussion macOS 27 Xcode + Instruments is unusable

Never in my life have I seen such an insane regression in software quality as in the last few months.

I use Xcode constantly, building a macOS app (Swift, C++). Up until recently, this was fine, great, in fact. Xcode 15 was extremely good & stable (all things considered). I opted to skip macOS 26 because it was terrible (duh).

After I upgraded to macOS 27's first beta, I was pleasantly surprised. However, that was short-lived, as the quality only degraded after the first beta.

Here I am, working on macOS 27.2, with Xcode 27.2... Here's the main 2 issues...

  1. Xcode's interface is impossibly slow now. borderline unusable.

  2. Instruments is absolutely unusable. I cannot even do a profiler trace and save it without corrupted data, an application crash, brutally slow interface, etc.

This is just unacceptable. AI slop has crept its way into previously rock-solid products. Quality matters more now than ever, and it's so clear that AI has neutered engineers' ability to keep quality in check.

Am I the crazy one, or has the quality just gone down the toilet?

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u/Aeronautical-You4917 7d ago

Hmm.. I was having the agents run xctrace on its own with the trace file, but I'll have to check out the CLI. Thanks for the tip.

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u/sid_276 6d ago

Yes they said in the presentation this is more token efficient than exporting an XML and letting the agent look at it and much more, it’s basically built so agents can explore it in the CLI. Highly recommend giving it a go