"Invalid Node Structure" "The Volume Machintosh HD Could Not Be Verified Completely" is one error every Apple OS user must fear, the error is a sign of corrupt storage disk directory structure and the Mac OS X built-in Disk Utility fails to fix the problem. Most of the time a user would get stuck at the Apple Logo with the spinner, even if you are lucky to boot into the operating-system you will find missing applications and issues with your dashboard depending on which part of the directory catalog got corrupted.
Luckily, we do have quite a few tricks and tools up our sleeves to get this handled properly fixing the system making sure maximum possible data recovery. In this post, I will be sharing three possible solutions to get this issue resolved.
Apple iMac and Macbook's built-in wireless card is known to have limited coverage as it does not feature an external antenna for better signal reception, however we can easily boost the Wi-Fi signal strength and range of any Apple Mac computer using external USB wireless dongles with external antenna. To get this working make sure you have an WiFi USB Adapter which is compatible with Apple Mac OS X and have drivers available for it, luckily for me the Realtek 8191 Chipset based Mini 300Mbps USB Wireless Adapter we used earlier to 
The head of Google-owned Motorola’s research division, introduced an ingestible vitamin prototype that transforms your entire body into an authentication passcode at the D11 Conference last week. Developed by Proteus Digital Health, the FDA-approved pill includes wearable and ingestible sensors that work together to detect ingestions and physiologic data.