Got an Older Mac? MLPostFactor Installs OS X 10.8.3 on Old Unsupported Macs
Many older Macs lost out on the ability to run OS X Mountain Lion (10.8.3!), but some hard working fellows have created a free third party tool called MLPostFactor that allows for the newest version of OS X to be installed on older, officially unsupported Macs. The process used to be quite complicated, but with MLPostFactor it’s easier than ever and can now be done by creating a partition, running the MLPF app, installing OS X as usual, then using the MLPostFactor app again to patch the ‘failed’ installation. Reboot and automagically OS X Mountain Lion will be running on the older Macs, breathing new life into older hardware.
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You can change the default alert times of calendar events on iPhone and iPad. 
Anyone who takes a lot of screenshots in Mac OS X knows the challenges associated with them; how quickly their desktop will fill up with various PNG files, sorting those into folders or just tossing them elsewhere, converting the screenshots to a different image format, copying them to the clipboard for pasting into another app, cropping down to size, or whatever else is required before the screen captures are in their final usable format.



A little-known screen flashing feature exists in Mac OS X that provides an alternative way of being notified of system alerts, meaning that anytime you’d typically hear the general system sound effect feedback, see a bouncing Dock icon, or have a new icon badge appear, the screen will briefly flash instead. The screen flash alert is silent but offers unmistakable feedback that an alert has occurred, and can be used in conjunction with the standard alert sounds too.
Ever wanted to create a reminder on the iPhone that is on a unique repeating interval? Maybe of alternating days, like a reminder every other day, or a reminder every 3 days? Oddly, this option isn’t available natively in the Calendar or Reminders apps of iOS, but these custom repeat reminder options do exist on the iPhone and iPad, you just have to use Siri to create them.
The iPad can play a variety of video formats without any additional apps or tools, and the bundled Videos app is more than sufficient to play a variety of very common movie file types including mp4, m4v, mov, and mkv. If you have such a movie on a computer that you want to watch on the iPad, you’ll need to follow a fairly simple process to copy it over, but nonetheless it’s not always so straight forward to users who are new to the platform.