结果dig -6 google.com：
; <<>> DiG 9.8.3-P1 <<>> -6 google.com
;; global options: +cmd
;; connection timed out; no servers could be reached
如果dig -4 google.com工作正常，这意味着什么？这是否意味着我的提供商不支持IPv6？
更新
我的 /etc/resolv.conf
#
# Mac OS X Notice
#
# This file is not used by the host name and address resolution
# or the DNS query routing mechanisms used by most processes on
# this Mac OS X system.
#
# This file is automatically generated. …