Magento 1.9.1 Fatal error: Call to a member function isLockExists()

If you encountered the Fatal error: Call to a member function isLockExists() after trying re-index your Magento site, then don’t panic. It’s just a minor glitch after upgrading from 1.9.0.1 to 1.9.1. Just clear your cache then try re-indexing again. It will work afterwards. If your latest Magento site still doesn’t work, try logging out the logging in back again and all the errors will be gone in no time.

OSX Yosemite WiFi doesn’t connect automatically

If you encountered this problem wherein after upgrading from Mavericks (or any other OSX prior to Yosemite) to Yosemite, you can’t connect to your home WiFi automatically. Every time you turn on your laptop or wake it up from sleep, then you need to reconnect to your router again. The issue is that Yosemite doesn’t allow access to your router by default. After upgrading, it somewhat changed the preferences inside your Keychain Access. In order to make your Mac connect to the wifi automatically again, just follow these few easy steps.

First, go to your Keychain Access. If you don’t know where it is, just press CMD + Space Bar, then search for Keychain Access, just like this:
yosemite-spotlight-search
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