Keep multiple versions of applications on Macintosh

Most of the DevOps tools are still in beta versions, many times the new version is not compatible with your existing scripts or have an error that stops your scripts working. To be able to keep multiple versions of the applications and easily switch between them, create symbolic links and point to the version you […]

How to copy files to the clipboard

When you work in the graphical user interface (GUI) of your operating system, and want to copy the contents of a file to the clipboard, you can use the following commands: On OS X run: cat FILE_NAME | pbcopy On Linux run: cat FILE_NAME | xclip On Windows (via Cygwin/Git Bash) run: cat FILE_NAME | clip

Xcode app development troubleshooting

This post is a collection of common error messages you may receive during application development in Xcode. Error message Receiver ‘NSManagedObjectContext’ for class message is a forward declaration Solution Add #import <CoreData/CoreData.h> to the … – Prefix.pch Prefix header file in the Supporting Files folder  

QWERTY Hungarian keyboard on an English Macintosh keyboard

The English characters on the English and Hungarian keyboards are almost at the same place. The exceptions are the Z and Y keys, those are swapped. When you activate the Hungarian keyboard on a Mac with an English keyboard, the Z key will display Y and the Y key will display Z on the screen. […]

How to lock your Macintosh computer

In windows when you press the Windows-L key combination the login window appears to protect your computer in the office while you are getting a cup of water from the kitchen. To lock a Mac computer click your name in the upper right corner and select Login Window… To blank the screen press the Shift–Control–Eject […]

Apple Objective-C programming fundamentals – Part 1 – The language.

To write an application for an Apple device (iPhone, iPod, iPadn, Macintosh) Apple recommends the Ojbective-C language. Xcode, the Apple development environment (IDE) supports the usage of Objective-C. This article summarizes the basics of Objective-C for beginners of that language. It is helpful if you already have some programming experience, otherwise some terms will require […]