xcode 6Apple today released an updated version of Xcode, Xcode 9.3.1. The new version of Xcode comes over a month after the release of Xcode 9.3, which was launched alongside iOS 11.3 back in late March.

Xcode 9.3.1 is a minor bug fix update. According to Apple's release notes, it addresses an issue that could cause a user to have to log in with their Apple ID repeatedly and it fixes a bug that could cause Xcode to hang when using Playgrounds.

Xcode 9.3, the previous update, introduced a new Energy organizer designed to help developers detect when an app or app extension is using too much battery life on a user's device.

The software also brought a new 64-bit testing mode for macOS 10.13.4, which is designed to let developers test software for 64-bit compatibility as Apple prepares to start phasing out 32-bit Mac apps. As of Xcode 9.3, Xcode support for macOS 32-bit support has been depreciated.

Xcode 9.3.1 will be followed by Xcode 9.4, which is currently in beta testing. Apple has seeded two betas of Xcode 9.4 to developers thus far.

Top Rated Comments

hunt2013 Avatar
90 months ago
That goodness for the fix to Playgrounds crashing. It is hard to test stuff when it crashed every 5 minutes.
Score: 2 Votes (Like | Disagree)
Reason077 Avatar
90 months ago
Xcode really does crash a fair bit, doesn’t it.
Mines pretty stable so long as you stick to the code editors. But once you start messing around in Interface Builder, it can be a nightmare.
Score: 2 Votes (Like | Disagree)
chrono1081 Avatar
90 months ago
Finally fixed playgrounds! They're so useful and it sucks not having them.
[doublepost=1526048728][/doublepost]
How can I crash thee, let me count the ways... Xcode crashing is basically expected for me at this point, you just never know what's going to make it crash the next time.
I go months between crashes and I use it for at least 8 hours a day. I'm not sure how so many people are getting so many crashes. The only crashes I experienced frequently were not even crashes, but rather slowdowns and unresponsiveness in the playgrounds.

I'm not saying you're lying about the crashes, I'm rather just curious on why some people experience so many of them and what the common denominator among those experiencing crashes is.
Score: 1 Votes (Like | Disagree)
Markoth Avatar
90 months ago
That goodness for the fix to Playgrounds crashing. It is hard to test stuff when it crashed every 5 minutes.
How can I crash thee, let me count the ways... Xcode crashing is basically expected for me at this point, you just never know what's going to make it crash the next time.
Score: 1 Votes (Like | Disagree)
tzm41 Avatar
90 months ago
The Playgrounds are almost useless. Due to bugs and limitations, and I don't just mean the one they fixed, it's honestly faster in almost every case to use a fresh project.

Better yet, use React Native if you wanna quickly iterate with GUI. It's so much easier because you just write to the file, and it insta-updates so you can tweak things quickly instead of having to take forever rebuilding (Swift takes sooooo freaking long to build vs ObjC). That and the language and libraries are way easier to deal with for GUI. And I get to use Vim. Only thing is I feel dirty using Javascript.
[doublepost=1526196452][/doublepost]
No, mine crashes pretty rarely now. But... rant incoming... ever since the Swift update, it's been crappy in many other ways. Builds take forever. There are not-super-rare memory leaks. I used to get tons of segfaults IN THE COMPILER while compiling, and it still happens on rare occasions if I have a syntax error in some crazy thing involving generics. The debugger's variable inspection is broken af, like to the point where I can't expect anything to work, so I use print statements instead. The code completion used to also be broken, but now it works pretty reliably but often slowly.

Btw, Swift is a decent language and quite the engineering marvel, but there are some decisions they made that I can't fathom. String manipulation is unbelievably difficult, to the point where I've relied on custom solutions. Structs are very weird to work with, and pass-by-value arrays are a "wtf" kind of surprise to newbies. Syntax is weird and unintuitive in many places, especially code blocks.
Second the part with debugger variable inspection. I never use that crap anymore.
Score: 1 Votes (Like | Disagree)
tzm41 Avatar
90 months ago
Finally fixed playgrounds! They're so useful and it sucks not having them.
[doublepost=1526048728][/doublepost]

I go months between crashes and I use it for at least 8 hours a day. I'm not sure how so many people are getting so many crashes. The only crashes I experienced frequently were not even crashes, but rather slowdowns and unresponsiveness in the playgrounds.

I'm not saying you're lying about the crashes, I'm rather just curious on why some people experience so many of them and what the common denominator among those experiencing crashes is.
It definitely depends on the complexity of your project. It doesn't handle very large projects, or projects with a lot of RxSwift, or code that puts compiler's typer inference ability to test, very well. Also if there are some IBDesignables, IB crashes very often.
[doublepost=1526055140][/doublepost]
Except, when someone is using the Apple provided lessons in App Development with Swift (which Apple is promoting as the definitive teaching solution), the student has to use playgrounds for a majority of chapters.

I'm glad Apple fixed it.
[doublepost=1526053450][/doublepost]

I'm guessing here, but I'm betting this line from your signature has something to do with it: "Mac Pro (2010): 3.33Ghz Intel Xeon (6 core) - 24 GB RAM - NVidia Quadro k5000".

Before this latest bug, my 15" MacBook Pro had no issues, but my 13" MacBook Pro would hang from time to time.
For me, Xcode 9 itself probably only crashes once per week. I consider that huge improvement from 7 and 8. The crashes are mostly not due to the power of the machine though. Often times it's code editor trying to access an non existent line and causes index out of bounds, or some other cryptic crash on NSView loading frames.

IB engine crashes quite often, as well as compiler when I switch branches.
Score: 1 Votes (Like | Disagree)

Popular Stories

iOS 19 Mock WWDC25 Feature

iOS 19 Expected to Run on These iPhones

Monday March 31, 2025 5:28 pm PDT by
iOS 19 will not be available on the iPhone XR, iPhone XS, or the iPhone XS Max, according a private account on social media site X that has accurately provided information on device compatibility in the past. The iPhone XR, iPhone XS, and iPhone XS Max all have an A12 Bionic chip, so it looks like iOS 19 will discontinue support for that chip. All other iPhones that run iOS 18 are expected...
watchOS 11 Thumb 2 1

Apple Releases watchOS 11.4 With Sleep Alarm Update

Tuesday April 1, 2025 10:34 am PDT by
Apple today released watchOS 11.4, the fourth major update to the operating system that runs on the Apple Watch. watchOS 11.4 is compatible with the Apple Watch Series 6 and later, all Apple Watch Ultra models, and the Apple Watch SE 2. watchOS 11.4 can be downloaded on a connected iPhone by opening up the Apple Watch app and going to General > Software Update. To install the new software,...
AirPods Pro Firmware Feature

Apple Releases New Firmware for AirPods Pro 2 and AirPods 4

Monday March 31, 2025 11:27 am PDT by
Apple today released new firmware updates for all AirPods 4 and AirPods Pro 2 models. The new firmware is version 7E93, up from the 7B21 firmware that was installed on the AirPods Pro 2 and the 7B20 firmware available on the AirPods 4 and AirPods 4 with ANC. It is not immediately clear what new features or changes are included in the new firmware, but we'll update this article should we find ...
maxresdefault

Apple Releases iOS 18.4 With Priority Notifications, Ambient Music, New Emoji and More

Monday March 31, 2025 10:03 am PDT by
Apple today released iOS 18.4 and iPadOS 18.4, the fourth major updates to the iOS 18 and iPadOS 18 operating system updates that came out last year. iOS 18.4 and iPadOS 18.4 come two months after Apple released iOS 18.3 and iPadOS 18.3. Subscribe to the MacRumors YouTube channel for more videos. The new software can be downloaded on eligible iPhones and iPads over-the-air by going to...
Apple Card iPhone 16 Pro Feature

Visa and American Express Vying to Win Apple Card Deal in 'Fierce' Fight

Tuesday April 1, 2025 1:50 pm PDT by
Visa wants to pay Apple approximately $100 million to be the new payment network for the Apple Card, reports The Wall Street Journal. As of right now, the Apple Card is on the Mastercard payment network, but that is set to change because Apple is ending its partnership with Goldman Sachs. Both American Express and Visa are vying to replace Mastercard as Apple's card services provider, while...
iPhone 17 Pro 34ths Perspective

iPhone 17 Pro Launching Later This Year With These 10 New Features

Sunday March 23, 2025 10:00 am PDT by
While the iPhone 17 Pro and iPhone 17 Pro Max are not expected to launch until September, there are already plenty of rumors about the devices. Below, we recap key changes rumored for the iPhone 17 Pro models as of March 2025: Aluminum frame: iPhone 17 Pro models are rumored to have an aluminum frame, whereas the iPhone 15 Pro and iPhone 16 Pro models have a titanium frame, and the iPhone ...
iOS 18

Apple Seeds First Beta of iOS 18.5 to Developers

Wednesday April 2, 2025 10:11 am PDT by
Apple today seeded the first betas of upcoming iOS 18.5 and iPadOS 18.5 updates to developers for testing purposes, with the software coming just two days after Apple released iOS 18.4 and iPadOS 18.4. iOS 18.5 and iPadOS 18.5 can be downloaded from the Settings app on a compatible device by going to General > Software Update. We don't yet know what Apple is introducing in the iOS 18.5...