升级 TeX Live Utility (MacTex 2015) 中的所有软件包最终失败，并显示“操作不允许”

Question

我正在尝试升级在 MacBook Pro 上Tex Live Utility运行的 OS X Yosemite（10.10.5）上的所有软件包。MacTeX-2015

一个包一个包的安装都很顺利，直到最后，我在日志的最后几行看到了如下内容：

2015-09-28 12:40:24 +0000 Notice tlu_ipctask[55705] Installation complete; reconfiguring TeX Live
2015-09-28 12:40:27 +0000 Warning tlu_ipctask[55705]    done running mktexlsr.
2015-09-28 12:40:27 +0000 Warning tlu_ipctask[55705]    running mtxrun --generate ...
2015-09-28 12:40:31 +0000 Warning tlu_ipctask[55705]    done running mtxrun --generate.
2015-09-28 12:40:31 +0000 Warning tlu_ipctask[55705]    running updmap-sys ...
2015-09-28 12:40:37 +0000 Warning tlu_ipctask[55705]    done running updmap-sys.
2015-09-28 12:40:37 +0000 Warning tlu_ipctask[55705]    regenerating fmtutil.cnf in /usr/local/texlive/2015/texmf-dist
2015-09-28 12:40:37 +0000 Warning tlu_ipctask[55705]    running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine pdftex ...
2015-09-28 12:41:03 +0000 Warning tlu_ipctask[55705]    done running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine pdftex.
2015-09-28 12:41:03 +0000 Warning tlu_ipctask[55705]    running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine aleph ...
2015-09-28 12:41:05 +0000 Warning tlu_ipctask[55705]    done running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine aleph.
2015-09-28 12:41:05 +0000 Warning tlu_ipctask[55705]    running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine ptex ...
2015-09-28 12:41:06 +0000 Warning tlu_ipctask[55705]    done running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine ptex.
2015-09-28 12:41:06 +0000 Warning tlu_ipctask[55705]    running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine eptex ...
2015-09-28 12:41:10 +0000 Warning tlu_ipctask[55705]    done running fmtutil-sys --no-error-if-no-engine=luajittex --no-error-if-no-format --byengine eptex.
2015-09-28 12:41:10 +0000 Warning tlu_ipctask[55705]    running fmtutil-sys --no-error-if-no-engine=luajittex --byfmt dvilualatex ...
2015-09-28 12:41:12 +0000 Warning tlu_ipctask[55705]    done running fmtutil-sys --no-error-if-no-engine=luajittex --byfmt dvilualatex.
2015-09-28 12:41:12 +0000 Warning tlu_ipctask[55705]    running fmtutil-sys --no-error-if-no-engine=luajittex --byfmt lualatex ...
2015-09-28 12:41:15 +0000 Warning tlu_ipctask[55705]    done running fmtutil-sys --no-error-if-no-engine=luajittex --byfmt lualatex.
2015-09-28 12:41:15 +0000 Warning tlu_ipctask[55705]    running fmtutil-sys --no-error-if-no-engine=luajittex --byfmt pdfcsplain ...
2015-09-28 12:41:17 +0000 Warning tlu_ipctask[55705]    done running fmtutil-sys --no-error-if-no-engine=luajittex --byfmt pdfcsplain.
2015-09-28 12:41:18 +0000 Notice -[TLMAuthorizedOperation _runUntilChildExit][55339]    kqueue noted that pid 55706 exited (/usr/texbin/tlmgr --repository http://mirror.math.ku.edu/tex-archive/systems/texlive/tlnet/ --machine-readable --persistent-downloads update --all)
2015-09-28 12:41:18 +0000 Notice tlu_ipctask[55705] child process pid = 55706 exited
2015-09-28 12:41:19 +0000 Error tlu_ipctask[55705]  Value of errno is Operation not permitted
2015-09-28 12:41:19 +0000 Error tlu_ipctask[55705]  *** ERROR *** exit status of pid = 55706 was 1
2015-09-28 12:41:19 +0000 Notice -[TLMAuthorizedOperation _runUntilChildExit][55339]    waitpid returned 55705, WIFEXITED(256) = 1, errno = 1 (Operation not permitted)
2015-09-28 12:41:19 +0000 Notice -[TLMAuthorizedOperation _runUntilChildExit][55339]    kqueue noted that tlu_ipctask (pid = 55705) exited with status 1

为什么我会收到此错误？我该如何解决？