You may meet this error message when run app in Mac osx Mountaine Lion, app can’t be opened because it is from an unidentified developer,


you can fix it in security preferences, open preference windows, select security icon,

you open “security and privacy” setting window, click Lock icon at left-bottom corner to unlock, so you can make changing.

you select “Anywhere” item in “Allow applications downloaded from” section, it is done, you run our app.

Gatekeeper

If you’re running OS X Mountain Lion on your Mac there’s a feature you should know about called — Gatekeeper. The primary function of Gatekeeper is to prevent malware like viruses and trojan horses from getting their hacking hooks into your Mac. Gatekeeper does this, by default, by only allowing apps that are downloaded from the Mac App Store or from “identified and trusted developers” be opened.

But app downloaded from our website safe, though the developer didn’t or couldn’t get a trusted certificate from Apple? (For example, Jailbreak software). There are a few ways to bypass Gatekeeper if you run into this issue. we have show you how.

How to deauthorize Adobe Digital Editions

To deauthorize Adobe Digital Editions, and then re-authorize with the correct Adobe ID.

1. Deauthorize Adobe Digital Editions

  • a) Open Adobe Digital Editions
  • b) On your keyboard, simultaneously press the Ctrl, Shift, and D buttons (if on Windows) or the Cmd, Shift, and D buttons (if on a Mac)
  • c)Click the button that says Deauthorize Computer

2. Authorize Adobe Digital Editions


  • a) If you don’t already have an Adobe ID, create one here
  • b) Open Adobe Digital Editions
  • c) Click on the Library button (looks like 3 books, at the left of the page)
  • d) Click on the downward arrow next to the word LIBRARY
  • e) Click on Authorize Computer

React and React Native – Second Edition – PDF download


React and React Native is most popular book about React in oreilly.com, Build applications for web and native mobile platforms with React, JSX, Redux, and GraphQL Key Features Explore how functional web development works with React, Redux, and React Native Build apps with unified architecture with Facebook’s React, Relay, and GraphQL Understand the platform in-depth, from routing to server-side rendering Book Description This books takes you through using React 16 and React Native 0.5 to create powerful and engaging desktop mobile and native applications for all platforms. You start by learning how to craft composable UIs using React, ranging from rendering with JSX and creating reusable components to routing and creating isomorphic applications that run on Node.js. We then move on to show you how to take the concepts of React and apply them to building Native UIs using React Native.

Step by step guide to download React and React Native – Second Edition

Oreilly Downloader is tools to download ebook on oreilly.com with 1-click. it download ebook to pdf file, read them on iPad, Kindle, tablet or other device without limitation, user also can print pdf ebook. It is very easy to use, just 1-click to download computer science book on oreilly.com

1). Download and install Safari Online Downloader, it run like a browser, user sign in safari online in webpage, find book React and React Native – Second Edition to download and open it.

2). Find book to download, click “Reading” button to open book.

2). User open book in downloader, wait until “Download” button is ready, click download button to download ebook, it takes a while.

3). Downloader go through all book pages , it takes a while.

4). new PDF file created when finished, it saved in My document folder, “doc\ebook converter\safari online downloader\” .