Mac OS X

The OS X Terminal is an exceptionally useful tool for getting to the underpinnings of OS X and troubleshooting problematic aspects of the system, developing and testing code, and managing remote connections among many other details. When you launch the Terminal, the system should load the default shell in which you can execute various programs and scripts, but depending on how you have configured your system the shell may not load and instead show a blank Terminal window.

There are a couple of possible reasons why this might happen, which are that the default shell configuration for your account may … Read more

The OS X menu bar is a central location for accessing system resources in the Apple menu, application-specific menus, and also a number of system settings through menu extras that can be appended to the right side of the menu bar. Some extras that are on by default include the time and date, battery level, and volume control, but others can be added to the bar, including VPN status, keychain, the script menu, and Bluetooth status.

Though these menu extras are convenient, there may be times when problems occur with this part of the system menu, such as freezes and … Read more

One of the major differences in how applications are handled between Windows and OS X are how the system presents them to you in the user interface. With Windows, each program will generally load in a single window that contains the program's menus and other details, and then be managed in that window. If you open the program again then often the system will launch a second instance of this program that runs along side the first, so each can be quit and managed independently.

On the other hand, in OS X applications are not isolated to a similar … Read more

Lately Java has been getting a bit of bad press, thanks to several consecutive security holes that have been exploited by malware developers. One notable occurrence was the Flashback malware threat that affected a number of OS X users, which (though due in part to Apple's negligence about Java upkeep) was rooted in the Java runtime. More recently, Java 7 has seen a new zero-day vulnerability that has been circulating in exploit kits.

In response to these threats, many in the tech community have recommended that people uninstall Java altogether. However, this can be impractical for some, as many … Read more

Separate user accounts in OS X allow the system to sequester data, settings, and other details for individual users. To identify user account, there are of course the long and short usernames for it, but in addition OS X includes an account picture that while not functional is aesthetically useful at the login window, in Mail and chat messages, among other aspects of the system.

The generic account picture in OS X is a gray silhouette on a darker gray background, that can be seen by enabling the Guest user account in the system, but other accounts are randomly assigned … Read more

One of the features that OS X supports is the creation of URL links in the Finder, which much like aliases for files and folders provide a means of loading a particular Web page or other Web resource. Browser bookmarks and favorites are perhaps a more thorough and convenient way to manage your frequently accessed URLs, but the ability to access links via the Finder is still an option that might be useful to some.

To create a URL link, simply select the URL (or the favicon next to the URL) in the address field for your Web browser and … Read more

One relatively long-standing issue that a number of Mac users have been experiencing is an apparent incompatibility with Citrix services that have been installed on their Macs by IT departments at work or school locations. If this occurs users may experience slow systems with poor battery life, and find that the Activity Monitor utility shows a service called AGAdminService taking up 100 percent of the system's CPU.

Citrix offers a number of virtualization and cloud-based storage options for various work environments, in which applications and services for accessing secure databases (such as for health records) run on a central … Read more

When browsing the Web you may find text or images to be too small for you, and you may wish to increase their size or otherwise adjust the browser so you can properly see the content.

Though each browser has its own options for making text and images more legible, there are a few approaches in Safari that are a bit uncommon and not only help you zoom in and adjust what you are seeing, but also allow you to manage tabs and other content you are viewing.

Systemwide zoom The first option for zooming in Safari is to use … Read more

A new Trojan horse called Mal/JavaJar-B has been found that exploits a vulnerability in Oracle's Java 7 and affects even the latest version of the runtime (7u10).

The exploit has been described by Sophos as a zero-day attack since it has been found being actively used in malware before developers have had a chance to investigate and patch it. The exploit is currently under review at the National Vulnerability Database and has been given an ID number CVE-2013-0422, where it is still described as relatively unknown: