Install logs show:
Aug 24 08:53:04 vpn-nop-136 Sophos Installer[5540]: [SMEWriteReceiptStrategy.m:289] Missing bundle savi from external directory /var/folders/5m/ky_hdm9x1vj8tqnl65h_pfg0pkbs_1/T/AppTranslocation/64F22B83-71D9-4D47-9883-F74DDA9D8A62/d/Sophos Installer Components.
Aug 24 08:53:04 vpn-nop-136 Sophos Installer[5540]: [main.m:394] Error copying installer to secure location, error: An external file is missing.
Tested on Mac OSX 10.9 and 10.12. Downloaded from a direct link provided by Sophos support.
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