If your Mac running OS X Yosemite needs Java for application compatibility, online banking, or any of the myriad of other reasons, you can manually install one of two versions of Java that are compatible with OS X 10.10, either the latest version of JRE 8, or an older version from Apple which remains compatible with the newest version of OS X. How to set JAVAHOME to JDK 1.7 in MAC OS X 10.10 Yosemite If you have installed Oracle JDK 1.6 then you can follow these steps to point JAVAHOME environment variable to that JDK: 1) Open a terminal window 2) Open /.bashprofile file and add below line: export JAVAHOME= '$(/usr/libexec/javahome -v 1.7)'.
What's New:
- Improves compatibility with certain email servers when using Mail
- Fixes an issue in Photos that prevented importing videos from GoPro cameras
- Fixes an issue in QuickTime Player that prevented playback of Windows Media files
With Photos you can:
- Browse your photos by time and location in Moments, Collections, and Years views
- Navigate your library using convenient Photos, Shared, Albums, and Projects tabs
- Store all of your photos and videos in iCloud Photo Library in their original format and in full resolution
- Access your photos and videos stored in iCloud Photo Library from your Mac, iPhone, iPad, or iCloud.com with any web browser
- Perfect your photos with powerful and easy-to-use editing tools that optimize with a single click or slider, or allow precise adjustments with detailed controls
- Create professional-quality photo books with simplified bookmaking tools, new Apple-designed themes, and new square book formats
- Purchase prints in new square and panoramic sizes
It’s easy to upgrade your iPhoto library to Photos - just launch the app to get started. To learn more about Photos, please visit: https://www.apple.com/osx/photos/
This update also includes the following improvements:
- Adds over 300 new Emoji characters
- Adds Spotlight suggestions to Look up
- Prevents Safari from saving website favicon URLs used in Private Browsing
- Improves stability and security in Safari
- Improves WiFi performance and connectivity in various usage scenarios
- Improves compatibility with captive Wi-Fi network environments
- Fixes an issue that may cause Bluetooth devices to disconnect
- Improves screen sharing reliability
Redesigned interface. Completely new. Completely Mac.
With OS X Yosemite, we set out to elevate the experience of using a Mac. To do that, we looked at the entire system and refined it app by app. Feature by feature. Pixel by pixel. And we built great new capabilities into the interface that put need-to-know information at your fingertips. The result is that your Mac has a fresh new look, with all the power and simplicity you know and love.
Mac and iOS are connected like never before.
Use a Mac or an iOS device, and you can do incredible things. Use them together, and you can do so much more. Because now OS X and iOS 8 enable brilliant new features that feel magical and yet make perfect sense. Make and receive phone calls without picking up your iPhone. Start an email, edit a document, or surf the web on one device and pick up where you left off on another. Even activate your iPhone hotspot without ever taking your iPhone from your pocket or bag.
Do everyday things in extraordinary ways.
One of the best things about a Mac is that it comes loaded with state-of-the-art, beautifully designed apps you’ll love to use every day. In OS X Yosemite, those apps give you new ways to do some of the things you do most. The apps you use to surf the web, read your mail, send messages, and organize your files and content have a simpler, more elegant look, and we’ve enhanced them with powerful new features.
Popular apps in Operating Systems
After comparing different guides on the internet, I ended up my own version base on the Hadoop official guide with manual download. If you prefer Homebrew, this one would be your best choice. Actually there is no difference in the configuration of these two methods except the file directories. Here I extend the official guide by more details in case you need it.
Also, this guide is part of my Hadoop tutorial 1. It aims to setting up the pseudo-distributed mode in single node cluster. And I will explain the HDFS configurations and command lines in Hadoop tutorial 2.
1. Required software
1) Java
Run the following command in a terminal:
If Java is already installed, you can see a similar result like:
If not, the terminal will prompt you for installation or you can download Java JDK here.
2) SSH
First enable Remote Login in System Preference -> Sharing.
Now check that you can ssh to the localhost without a passphrase:
If you cannot ssh to localhost without a passphrase, execute the following commands:
2. Get a Hadoop distribution
You can download it from Apache Download Mirror.
3. Prepare to start the Hadoop cluster
1) Unpack the downloaded Hadoop distribution.
2) Run the following command to figure out where is your Java home directory:
You can see a result like:
3) In the distribution, edit the file etc/hadoop/hadoop-env.sh to define some parameters as follows:
4) Try the following command:
This will display the usage documentation for the hadoop script.
Now you are ready to start your Hadoop cluster in one of the three supported modes:
- Standalone mode
- Pseudo-distributed mode
- fully-distributed mode
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We will go through pseudo-distributed mode and run a MapReduce job on YARN here. In this mode, Hadoop runs on a single node and each Hadoop daemon runs in a separate Java process.
4. Configuration
Edit following config files in your Hadoop directory
1) etc/hadoop/core-site.xml:
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2) etc/hadoop/hdfs-site.xml:
3) etc/hadoop/mapred-site.xml:
4) etc/hadoop/yarn-site.xml:
5. Execution
1) Format and start HDFS and YARN
Format the filesystem:
Start NameNode daemon and DataNode daemon:
Now you can browse the web interface for the NameNode at - http://localhost:50070/
Make the HDFS directories required to execute MapReduce jobs:
Start ResourceManager daemon and NodeManager daemon:
Browse the web interface for the ResourceManager at - http://localhost:8088/
2) Test examples code that came with the hadoop version
Copy the input files into the distributed filesystem:
Run some of the examples provided:
This example counts the words starting with 'dfs' in the input.
Examine the output files:
Copy the output files from the distributed filesystem to the local filesystem and examine them:
or View the output files on the distributed filesystem:
You can see the result like:
3) Stop YARN and HDFS
When you're done, stop the daemons with:
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