OS X

I love QuickLook, it's the fastest way to peak and copy from files. But not all file's open in QuickLook and text files need the .txt extension for QuickLook to work. Lucky you can extend QuickLook with plugins and QLStephen has the excellent QuickLook plugin that lets you view plain text files without a file extension. Files like: README, INSTALL, CHANGELOG, INFO etc...
And even text files with extensions like .info .install .inc are readable! Great work :) http://whomwah.github.io/qlstephen/ Read more about OS X QuickLook text files without an extension

Whenever working with lots of folders and files you maybe had to close multiple folders in a list view all at once, founding out that there is no key combo for that!?
There is no real key combo for this but you can achieve it in two easy steps:
1. select all: ⌘+A
2. press left arrow: ← Read more about OS X, Closing all open folders in list view in the finder.

When you started with OS X Photos it will create a new library (Photos Library.photoslibrary) and migrate your old iPhoto library (iPhoto Library.migratedphotolibrary). So when you are fine with using only Photos you can safely delete it iPhoto and the iPhoto library to free up some harddisk space. To be save I moved the iPhoto Library.migratedphotolibrary to an external drive. Read more about Save space with OS X Photos and iPhoto

Save space (and time) with your Time Machine backups:

- Open a Finder window and go to your Mac's Hard Drive
- Open System Preferences > Time Machine, then click Options
- Drag the System folder from your Mac's hard drive into the "Exclude these items from backup" section
- OS X will prompt you to exclude other related items, including system applications. You probably don't need those core items since they come preinstalled in OS X anyway, and your initial and potentially future backups won't take as much time. Read more about Save space (and time) with your Time Machine backups

Ever need to create a bootable install USB for your mac?
Yosemite has a built in USB installer maker!
Just grab a 8GB Usb Stick and create your installer today, always good for emergencies! Read more about Create a Quick OSX bootdisk on USB

Recently i was having some problems with iTunes 12 on Yosemite and iTunes wouldn't respond after a while or iTunes would just crash when playing a podcast or search the iTunes store.

But there is a simple fix via the terminal following this kb article from Apple for resetting the Sync services :

Fix from apple:
http://support.apple.com/en-us/TS1627
OS X Mavericks 10.9.3 and Later
defaults delete com.apple.SyncServer SyncServicesResetWorldRunOnce Read more about OSX, Fix for iTunes 12 not responding and crashing in Yosemite

Need the ~Library folder back in your home folder?
In OS X Mavericks, Apple made it easy to do so. Navigate to your home folder and hit CMD+J to pull up the “View Options” window. You’ll notice a great addition to the palette: "Show Library Folder" !!
It’s that simple – and we're glad to see someone at Apple recognizes that people want access to the Library folder without having to jump through a lot of hoops!! Read more about OSX, How to show the user library folder in OS X Mavericks

Quickly add a sticky note from any tekst by selecting the tekst and hitting the keys: SHIFT+COMMAND+Y
Just love it! and maybe you're going ti use sticky notes again !!

more here:
http://www.tuaw.com/2014/05/19/os-x-tip-how-to-quickly-transform-selecte... Read more about OS X , Quickly add a stickies note from any text

When browsing trough your files with quick look, you can open the files right from the Quick Look window by clicking "Open in Preview" (or whatever the default app is for that file).

But when you don't want to open a file from quick-look in preview, you can actually click and hold or right-click on that button to open the file in any app you want—perfect for when you want to edit a photo in, say, Photoshop, instead of pre-viewing it! Read more about OS X, Quick Look, open file in other applications

Quick Look is one of OS X's best features. Hit the Spacebar when you select a file, and you'll see a preview of that file without having to open up an app. It's great, but you can't select any text when you're in the preview.
You can use the following terminal command in the OS X terminal app to enable text selection in Quick Look:

defaults write com.apple.finder QLEnableTextSelection -bool true

killall Finder Read more about OSX, Copy text directly from Quick Look