The tech note for Error 2027 Specific Symptom # 4 for Mac users requires the end user to change the text file under the echoid.dat file from 0x010 to0x004. If the end user has not enabled there permissions as an administrator to “Read & Write” they will not be able to save any changes to the text file. The tech note below will allow Mac OS X Yosemite end user to change the settings to "Read & Write" allowing the echoid.dat text file to be changed and saved. IMPORTANT NOTE: Please see tech note on Error # 2027 Specific Symptom # 4 for resolving that error message. This document is a companion to that tech note.
Taken fromhttps://support.apple.com/kb/PH18894?locale=en_US&viewlocale=en_US
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