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Slow Performance When Launching or Connecting to Flat Files After Upgrading to macOS Sierra


Published: 03 Oct 2016
Last Modified Date: 09 Feb 2017

Issue

After upgrading to macOS Sierra, Tableau Desktop is slow to launch. The following behaviours occur:
  • The icon bounces in the task bar before launching. 
  • Tableau Desktop is slow to connect to flat files, the following message is displayed: ​"Loading data source for the first time..."

Environment

  • Tableau Desktop 9.3 and later versions
  • macOS Sierra 10.12

Resolution

Edit the hosts file on the Mac to include your computer's local network name at the end of the "127.0.0.1 localhost" line. To find your local network name,
  • Choose Apple menu > System Preferences.
  • Click Sharing.
  • Your computer’s local network name is displayed beneath the computer’s name at the top of Sharing preferences, labeled with dashes as:
Computers on your local network can access your computer at:
Example-MacBook-Pro.local 

Using that example, add your computer's local network name to the end of the 127.0.0.1 line of the hosts file like so:
127.0.0.1 localhost Example-MacBook-Pro.local

Cause

The local network name and the name associated with the 127.0.0.1 IP address are not the same. 
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