Mac OS X

There is no question that regardless of the computing platform you use, malware happens. To help prevent these and other unwanted programs from running, Apple includes a data execution prevention routine called GateKeeper, which offers three layers of protection. The first allows everything to run, the second allows only applications signed with a valid Apple Developer ID to run, and the third allows only programs distributed through the Mac App Store to run.

Apple provides the Developer ID option with the assumption that most who use its Developer program create legitimate and trustworthy code, since their works will be easily … Read more

If you are using more than one Mac, or have replaced your Mac with a new one, there are several ways you can migrate your account to the new system.

Conventionally, when you get a new system you are presented with the OS X Setup Assistant, which will guide you through migrating your data from an existing system or a backup.

In addition to Setup Assistant, you can use Apple's Migration Assistant tool at any time to transfer data from one Mac to another. This tool is especially useful for establishing your current user account on another system. Simply … Read more

An ongoing issue for some people who have installed Mountain Lion is the inability to access their systems' internal optical drives. Once installed, inserting a disc results in a couple of noises before the disc is ejected. While this can sometimes happen for burned discs that are no longer readable, it appears to happen for all discs, be they home-burned or commercial.

If this is happening on your system, first try testing the problem with multiple operating systems to see if the problem is hardware or software based. If your system came with gray boot discs, try inserting them and … Read more

Apple's Preview program is the default PDF viewer in OS X, and has a number of options for annotating and otherwise managing PDF files. One of its features is support for Quartz filters, which can be applied to PDFs and image files to convert them, for example into sepia, black-and-white, or gray scale. A Quartz filter can be used to reduce the PDF's file size, but while it's effective at doing so, you may find images in the resulting PDF too grainy to use.

These compression routines are done by adjusting the embedded image quality of the … Read more

MacFixIt Answers is a feature in which I answer Mac-related questions e-mailed in by our readers.

This week, readers wrote in with questions on the locations of the various libraries in OS X, the options for using an old internal hard drive from a MacBook as an external hard drive, and the options for managing Wi-Fi networks that span greater distances than their radios can cover.

I welcome contributions from readers, so if you have any suggestions or alternative approaches to these problems, please post them in the comments!

Question: The location of various libraries in OS X MacFixIt reader &… Read more

When Apple releases Mac firmware updates, the system undergoes a special installation procedure in which it shows a progress bar on a gray screen and then reboots. If you have an update available but do not see the progress bar when applying it, it may not have installed properly. As such, you may see the update still showing in Apple's Software Update service.

There are some special requirements for handling firmware updates as opposed to standard software updates, and if they are not met, the system may fail to install the update.

The first requirement is to ensure that … Read more

Though OS X offers great multitasking features, having multiple windows open in multiple applications can sometimes hinder concentration. If you don't want to put the application you're mainly working with in full-screen mode, there are other options.

For example, you can minimize windows to the OS X Dock, but this has its limitations, including filling the Dock so it expands across your screen. Additionally, it requires you to click and expand the window from the Dock to preview its contents, which results in the documents being reordered in the Dock when you minimize it again.

If you're … Read more

F-secure is reporting on new malware found for OS X, which appears to be a backdoor application that so far is known to take screenshots of the user's computer and then attempt to upload them to remote servers. The malware is being called OSX/KitM.A.

It's a small application called macs.app and was found on the Mac of an African activist who was a member of of the Oslo Freedom Forum. When installed, the application is appended to the current Mac user's log-in items so it runs whenever the affected user account is logged in. … Read more

OS X is localized to a number of languages, and with a few settings changes, you can set the OS interface -- as well as many programs -- to display in a different language. This is handy for multilingual types, but if you have inadvertently changed it to a language you do not understand, you might find it quite difficult to revert.

Fortunately, while the languages change, the layout still stays essentially the same. To switch back to your preferred language, you will need to follow these steps:

First go to the system preferences by opening the Apple menu and … Read more