Lion

An apparent issue in the versions of OS X that are preinstalled on Macs shipping from the factory is causing headaches for some users, where they may run into problems if they try to reinstall OS X or restore from a backup.

As described by MacNN and MacTrast, the issue appears to happen because of a permissions problem that results in a compatibility error when the Mountain Lion installer is downloaded and run on an affected computer. Instead of installing as it should, users see a warning that states the current system is not compatible with Mountain Lion, with the … Read more

Apple's autosave and resume features in OS X offer a great way to preserve your workflow if a program crashes or you simply need to quit it. However, these features do somewhat depend on the system's display output being constant, and may have some problems if you regularly change the system's display format.

If you use a MacBook system and plug in external monitors or if you regularly change display resolutions, then you might find certain programs (particularly Apple's TextEdit) will sometimes gather all windows into a collapsed group at some location on your display. This … Read more

Before it was revealed, the file URL error in OS X was a fairly obscure and benign bug, and perhaps still is for the most part; however, since learning about it, a number of people have tried it out on their systems to have some fun, only to find that in some instances the bug may stick and perpetually crash a particular program.

While it is known that the offending string that triggers the bug will be saved in crash logs, which in turn can crash the Crash Reporter and Console applications, it may also be saved in a program'… Read more

The Next Web has uncovered a bug in OS X that will crash the current application almost every time if invoked. Reportedly, in applications that support text entry fields, if you type the text "File:" followed by three forward slashes in the field to indicate a file address, then the program being used will freeze and then quit.

The bug is a problem in a core system service called Data Detectors that is responsible for handling dates and locations, part of which is a checking routine for an entered URL address. When you type information into programs that … Read more

While setting your Mac to automatically sleep after a period of inactivity has its energy-saving benefits, you may find that the system will go to sleep even when it is churning through data (e.g., applying a lengthy filter routine to groups of images).

This issue happens because Apple has implemented some changes to the latest versions of OS X that result in different requirements for the system to determine if it can go to sleep, and one of these is a new dependence on applications to invoke a "power assertion" to keep the system from going to … Read more

Gatekeeper is a new security measure introduced in OS X Mountain Lion that allows the system to prevent the execution of code that does not meet certain criteria, such as possessing a valid digital signature from Apple's developer community. When setting up GateKeeper in the Security system preferences, you can set it so that only approved applications from the Mac App Store are allowed to run, additionally allow programs from approved developers to run, or you can set no restrictions and allow everything to run.

When the restrictions are set, you can still run unapproved programs by right-clicking them … Read more

I share a lot of calendars with friends and family members using Apple's iCloud service. Every time someone adds an event to a shared calendar, I am bombarded with alerts across multiple iOS and OS X devices. It can get annoying. I don't so much mind the alerts on my iOS device, but I do mind them on OS X. Then recently, I stumbled upon the seemingly hidden preference to turn off shared calendar alerts in iCal. Here's where you can find it:

Apple has issued a supplemental update for version 10.8.2 of OS X, which addresses a few problems users are having with the way the OS handles the Keychain in some systems. The update is for Macs issued in 2012, and is a small 26.65MB download that will apply new versions of the SecurityAgent process and its supporting daemons and configuration files.

SecurityAgent is a background process that implements protocols for accessing certificates, keychains, and other security measures in OS X, and provides interface elements for user interaction with these, including dialog boxes that prompt for usernames and … Read more

Apple will be ending its beta program on December 14 for testing its new Messages service that is part of OS X Mountain Lion and iOS.

In releases of OS X prior to Mountain Lion, Apple included its iChat instant messaging program that consolidated numerous messaging services such as Jabber, AIM, and Yahoo chat into one interface; however, this did not integrate with Apple's own iMessage and FaceTime services that it included in the iPhone as alternatives to SMS messaging.

To tackle this gap, Apple released Messages Beta for OS X in February as part of the Mountain Lion … Read more