Mac下禁用一些高占用的进程
晚上在 terminal 里敲代码，发现系统异常的卡顿。在 Activity Monitor 里发现 ReportCrash 进程占用了大量的 CPU
不断发送崩溃报告说明不断有进程在崩溃，先看一下系统日志
$ tail -F /var/log/system.log
Feb 5 21:09:01 Sun-Zhongweis-MacBook-Pro com.apple.xpc.launchd[1] (com.alipay.DispatcherService[11484]): Service exited due to signal: Trace/BPT trap: 5 sent by exc handler[0]
Feb 5 21:09:01 Sun-Zhongweis-MacBook-Pro com.apple.xpc.launchd[1] (com.alipay.DispatcherService): Service only ran for 2 seconds. Pushing respawn out by 8 seconds.
Feb 5 21:09:09 Sun-Zhongweis-MacBook-Pro com.apple.xpc.launchd[1] (com.apple.nowplayingtouchui): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
Feb 5 21:09:11 Sun-Zhongweis-MacBook-Pro com.apple.xpc.launchd[1] (com.alipay.DispatcherService[11486]): Service exited due to signal: Trace/BPT trap: 5 sent by exc handler[0]
Feb 5 21:09:11 Sun-Zhongweis-MacBook-Pro com.apple.xpc.launchd[1] (com.alipay.DispatcherService): Service only ran for 2 seconds. Pushing respawn out by 8 seconds.
Feb 5 21:09:11 Sun-Zhongweis-MacBook-Pro com.apple.xpc.launchd[1] (com.apple.ReportCrash.Root[11487]): Endpoint has been activated through legacy launch(3) APIs. Please switch to XPC or bootstrap_check_in(): com.apple.ReportCrash.DirectoryService
Feb 5 21:09:11 Sun-Zhongweis-MacBook-Pro ReportCrash[11487]: assertion failed: 16D32: libsystem_trace.dylib + 76912 [6D34D1EA-2A3C-3D2D-803E-A666E6AEEE52]: 0x0
Feb 5 21:09:19 --- last message repeated 6 times ---
Feb 5 21:09:19 Sun-Zhongweis-MacBook-Pro com.apple.xpc.launchd[1] (com.apple.nowplayingtouchui): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
Feb 5 21:09:21 Sun-Zhongweis-MacBook-Pro com.apple.xpc.launchd[1] (com.alipay.DispatcherService[11489]): Service exited due to signal: Trace/BPT trap: 5 sent by exc handler[0]
Feb 5 21:09:21 Sun-Zhongweis-MacBook-Pro com.apple.xpc.launchd[1] (com.alipay.DispatcherService): Service only ran for 2 seconds. Pushing respawn out by 8 seconds.我的天，每隔几秒 com.alipay.DispatcherService, com.apple.nowplayingtouchui 这两个妖孽就作怪一次。实在是太卡了，先不调查这两个可疑进程了，先把 ReportCrash 解决掉。
禁用 ReportCrash
直接干掉进程肯定不管用，从名字就知道这个进程会自动被触发，除非修改系统配置。
Google 了一下，发现很简单，在 terminal 里执行
launchctl unload -w /System/Library/LaunchAgents/com.apple.ReportCrash.plist
sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.ReportCrash.Root.plist再观察 Activity Monitor，会发现 ReportCrash 进程不再出现了。系统又恢复了如丝般顺滑的状态。
重新启用的方法（估计我这辈子都不会启动这货）
launchctl load -w /System/Library/LaunchAgents/com.apple.ReportCrash.plist
sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.ReportCrash.Root.plistcom.alipay.DispatcherService 是马云爸爸下的什么蛋？
知乎上说是阿里用来检测支付插件是否有新版本而启用的后台进程，水木上有个老帖子说是阿里在偷偷收集用户隐私。当然，我觉得第二种说法更可信。毕竟，检测是否有新版本你启动的时候再检测不行么?
禁用方法
sudo launchctl unload /Library/LaunchDaemons/com.alipay.DispatcherService.plist 再次查看 system.log 会发现 alipay 的相关日志不再出现了。说明禁用成功。
为了以防万一，把电脑上的所有阿里的软件都卸载了（虽然只有阿里旺旺一个）
com.apple.nowplayingtouchui 跟 touch bar 有关？
Google 到的禁用方法
launchctl unload -w /System/Library/LaunchAgents/com.apple.touchbar.agent.plist
从命令来看，的确跟 touchbar 有关，然而我的老爷机上并没有 touch bar...
duang, SIP 阻止了我的操作
/System/Library/LaunchAgents/com.apple.touchbar.agent.plist: Operation not permitted while System Integrity Protection is engaged
我投降，我还是不敢禁用 SIP, 这个就这样吧，估计很快就被系统更新所修复
系统版本 10.12.3