In the previous article, I suggest you to download and install Xcode 4.3.2 for iOS development as all our upcoming tutorials will be written using this version.

More than you ever wanted to know™ This is not an official Apple website. Please consider donating to help maintain it. Looking for an API? Compared to Swift 4.0, the latest Swift compiler can build large apps more than twice as fast. Combined with the new Xcode new build system, your everyday edit, build, and test workflow is much faster. Optimized for the latest multi-core Mac hardware, the app and Swift make for a lightning-fast development platform.

A few readers have raised a question about Xcode:

Download refused because I am running Snow Leopard, they want”10.7.3″ which I presume is Lion. I had grief upgrading from Leopard to Snow Leopard and therefor am reluctant to further upgrade. Especially when Apple want cash to help with the problems (out of warrantee). Is it necessary to have Xcode for this course?

In the article, it mentioned OS X 10.7 and up in order to create app, can you explain the reason why Snow Leopard 10.6 will not be work?

Thanks for asking. Yes, Xcode 4.3 only works on Mac OS 10.7.3 (aka Lion). The reason why I recommend you to use this version of Xcode is that it supports the latest version of iOS (i.e. 5.1). However, this doesn’t mean you can’t develop apps on Snow Leopard (i.e. Mac OS 10.6).

Download Xcode 4.2 for Snow Leopard

You can’t download previous version of Xcode from Mac App Store. But if you have registered an Apple Developer account, Apple allows you to download Xcode 4.2 for Snow Leopard through its iOS developer website.

Simply go to the iOS developer homepage and login with your developer account. You can find the download link of Xcode 4.2 in the “Download” section.

I’ll try my best to cater the upcoming tutorial for both version of Xcode and the 4.2 version should be enough for educational purpose. However, once you’re familiar with app development and plan to sell an app, it’s recommended to upgrade to OS Lion and build your app with the latest version of Xcode.

As always, if you have any question, leave me comment or ask it in the AppCoda Community Forum.

National Library of Medicine, National Center for Biotechnology Information, U.S.

XcodeXcode is a complete developer toolset for creating apps for Mac, iPhone, iPad, Apple Watch, and Apple TV. Xcode brings user interface design, coding, testing, debugging, and submitting to the App Store all into a unified workflow. Downloading and Updating XcodeThe current release of Xcode is available as a free download from the The Mac App Store will notify you when an update is available or you can have macOS update automatically as it becomes available.The latest beta version and previous versions of Xcode can be downloaded from the.

To download Xcode, simply sign in with your Apple ID. Apple Developer Program membership is not required.To learn about the latest features and capabilities in Xcode, see.

For detailed information on updates in the latest released versions, including each beta release, see the. Using XcodeGet step-by-step guidance on how to use Xcode to build, test, and submit apps to the App Store.Providing Feedback and Reporting BugsYour feedback goes a long way towards making Xcode even better. With, you can report issues or request enhancements to APIs and tools. Include detailed information about issues, including the system and developer tools version information, and any relevant crash logs or console messages.

To provide feedback or ask questions, post your questions and comments on the. Submitting Apps to the App Store using XcodeIf you’re an Apple Developer Program member, Xcode provides an integrated workflow to prepare and submit apps to App Store. You should use the latest version of Xcode available on the to submit your apps, or when available, the latest GM seed release from the.Do not submit apps built using beta software, as beta versions of Xcode, Operating Systems, and SDKs are for development and testing only.

Invalid Private Key and Certificate PairingIf you received an error message saying, 'Xcode could not find a valid private-key/certificate pair for this profile in your keychain.' This error message indicates that the Keychain Access application on your Mac is missing either the public or private key for the certificate you are using to sign your app.This often happens when you are trying to sign and build your app from a different Mac than the one you originally used to request your code signing certificate. It can also happen if your certificate has expired or has been revoked.

Ensure that your app’s provisioning profile contains a valid code signing certificate, and that the Keychain Access application on your Mac contains that certificate, the private key originally used to generate that certificate, and the WWDR Intermediate Certificate.For instructions on how to resolve this and other code signing errors, review the. Apple Security UpdatesFor information on the security content of Xcode updates, visit the.

List of all hot keys for mac. CMPLACE A COMPONENT / Place a component.DALIGNED DIMENSION / Creates an aligned dimension.FRFIND/REPLACE / Find and replace.GPMODEL GROUP:CREATE GROUP; DETAIL GROUP:CREATE GROUP / Creates a group of elements.LIMODEL LINE; BOUNDARY LINE; REBAR LINE / Places a new line.LLLEVEL / Places a level in view.MDMODIFY / Enters selection mode to select elements to modify.PP or CTRL-1 or VPPROPERTIES; TOGGLE PROPERTIES PALETTE / Toggles the Properties palette.RPREFERENCE PLANE / Creates a reference plane using drawing tools.TXTEXT / Adds text.