几个月前，我的Mac开始崩溃。通常，当我单击Safari中的链接时，它就会发生（编辑：我使用Chrome进行了测试，并得到了相同的行为）。我单击一个链接，页面开始加载，然后整个计算机硬锁定。没有沙滩球，光标没有移动，键盘完全没有响应。两三分钟后，屏幕变黑，然后重新启动。
我尝试创建一个新的用户帐户并在该帐户下运行了一段时间。整个计算机变得超级敏感。但这并不能解决问题。我能够连续几天编程时都不会崩溃，我可以在不崩溃的情况下完成硬盘驱动器的整个超级duper克隆，但是将Safari引入其中可以使崩溃再次发生。
我应该指出，它偶尔会自发崩溃，但通常Safari在后台运行。
我运行Mavericks是因为我想在升级到优胜美地之前排除硬件问题。（在过去的几个月中，大多数Mac一直在架子上，因为崩溃从每周一次到每天大约一次，而且我担心硬盘问题。）
我试过了：
- 如上所述，创建一个新用户并在该用户下运行。
- 重置Safari。
- 创建超级duper克隆，启动克隆并运行磁盘实用程序，以排除HFS +损坏。两次我都尝试过，结果完全干净。
- 我也尝试过使用Apple硬件测试。因为我在此SSD上重新安装了山狮，所以我发现这行不通。硬件太旧，无法支持在Internet上运行AHT（这也不起作用），所以我从https://github.com/upekkha/AppleHardwareTest/blob/master/Readme.markdown下载了AHT 并将其安装到我的引导程序中驱动器，按照说明进行操作，但是仍然无法加载Apple Hardware Test。
我的问题：
- 根本问题是什么？
- 我应该安装优胜美地并希望最好吗？升级还是全新安装？
- 如何使AHT运行？
- 我开始认为这是磁盘问题。有什么我可以排除的吗？我可以用5400rpm的笔记本电脑驱动器替换掉我出色的SSD，并尝试尝试一下。
- Safari如何完全锁定我的计算机？
我正在寻找下一步和/或建议。谢谢！
编辑：添加了控制台日志：
6/15/15 12:11:32.429 AM WindowServer[383]: CGXReleaseWindowList: Invalid window 46 (index 0/2)
6/15/15 12:11:32.430 AM WindowServer[383]: CGXReleaseWindowList: Invalid window 45 (index 1/2)
6/15/15 12:11:33.102 AM sandboxd[245]: ([532]) com.apple.intern(532) deny mach-lookup com.apple.CalendarAgentLauncher
6/15/15 12:11:34.715 AM parentalcontrolsd[646]: StartObservingFSEvents [849:] -- *** StartObservingFSEvents started event stream
6/15/15 12:11:36.911 AM WindowServer[383]: disable_update_timeout: UI updates were forcibly disabled by application "Xcode" for over 1.00 seconds. Server has re-enabled them.
6/15/15 12:11:37.806 AM WindowServer[383]: common_reenable_update: UI updates were finally reenabled by application "Xcode" after 1.90 seconds (server forcibly re-enabled them after 1.00 seconds)
6/15/15 12:11:39.257 AM WindowServer[383]: disable_update_timeout: UI updates were forcibly disabled by application "Dropbox" for over 1.00 seconds. Server has re-enabled them.
6/15/15 12:11:39.372 AM WindowServer[383]: common_reenable_update: UI updates were finally reenabled by application "Dropbox" after 1.12 seconds (server forcibly re-enabled them after 1.00 seconds)
6/15/15 12:11:40.131 AM Dropbox[610]: PyObjCPointer created: at 0x6a9fc88 of type ^{OpaqueJSContext=}
6/15/15 12:11:42.756 AM GoogleSoftwareUpdateDaemon[617]: -[KeystoneDaemon logServiceState] GoogleSoftwareUpdate daemon (1.2.0.7709) vending:
com.google.Keystone.Daemon.UpdateEngine: 1 connection(s)
com.google.Keystone.Daemon.Administration: 0 connection(s)
6/15/15 12:11:43.912 AM ipcserver[682]: Valve Steam ipcserver started: 1.04
6/15/15 12:11:44.495 AM WindowServer[383]: disable_update_timeout: UI updates were forcibly disabled by application "Xcode" for over 1.00 seconds. Server has re-enabled them.
6/15/15 12:11:47.047 AM WindowServer[383]: common_reenable_update: UI updates were finally reenabled by application "Xcode" after 3.55 seconds (server forcibly re-enabled them after 1.00 seconds)
6/15/15 12:11:50.000 AM kernel[0]: fsevents: watcher dbfseventsd (pid: 698) - Using /dev/fsevents directly is unsupported. Migrate to FSEventsFramework
6/15/15 12:11:55.022 AM GoogleSoftwareUpdateDaemon[617]: -[KeystoneDaemon main] GoogleSoftwareUpdateDaemon inactive, shutdown.
6/15/15 12:11:56.287 AM Interface Builder Cocoa Touch Tool[713]: BUG in libdispatch client: kevent[EVFILT_VNODE] add: "Bad file descriptor" - 0x9
6/15/15 12:11:56.460 AM Interface Builder Cocoa Touch Tool[713]: assertion failed: 13F1077: libxpc.dylib + 29453 [464E62EA-4CF2-3FEF-9C17-692AD8D66AA8]: 0x8d
6/15/15 12:11:59.428 AM Dropbox[610]: The function 'CGContextClear' is obsolete and will be removed in an upcoming update. Unfortunately, this application, or a library it uses, is using this obsolete function, and is thereby contributing to an overall degradation of system performance.
6/15/15 12:12:01.809 AM Dropbox[610]: ICARegisterForEventNotification-Has been deprecated since 10.5. Calls to this function in the future may crash this application. Please move to ImageCaptureCore
6/15/15 12:12:57.612 AM com.apple.WebKit.Networking[497]: ERROR: ForceShrinkPersistentStore_NoLock -delete- We do not have a BLOB or TEXT column type. Instead, we have 5.
6/15/15 12:13:07.353 AM com.apple.SecurityServer[15]: Session 100040 created
6/15/15 12:13:15.104 AM com.apple.WebKit.WebContent[738]: CKSoftwareMap: Registering with Daemon
6/15/15 12:13:27.450 AM com.apple.WebKit.WebContent[745]: CKSoftwareMap: Registering with Daemon
6/15/15 12:13:38.490 AM com.apple.WebKit.WebContent[744]: CKSoftwareMap: Registering with Daemon
6/15/15 12:13:41.779 AM Scroll Reverser[608]: -_scrollPhase is deprecated for NSScrollWheel. Please use -momentumPhase.
6/15/15 12:13:48.885 AM com.apple.WebKit.WebContent[742]: CKSoftwareMap: Registering with Daemon
6/15/15 12:14:00.989 AM com.apple.WebKit.WebContent[744]: ERROR: ITSExceptionHandler: {message:"TypeError: 'null' is not an object (evaluating 'document.querySelector("#header").addClassName')", url:"https://se.itunes.apple.com/htmlResources/FC5B/da-storefront-autoinstallations.js", lineNumber:"381"}
6/15/15 12:14:06.452 AM com.apple.WebKit.WebContent[744]: ERROR: ITSExceptionHandler: {message:"TypeError: 'null' is not an object (evaluating 'document.querySelector("#header").addClassName')", url:"https://se.itunes.apple.com/htmlResources/FC5B/da-storefront-autoinstallations.js", lineNumber:"381"}
6/15/15 12:14:15.646 AM com.apple.launchd[1]: (com.apple.WebKit.WebContent.5FC80018-A2E0-4F0F-8730-89114D0E147B[738]) Exited with code: 1
6/15/15 12:15:56.211 AM com.apple.WebKit.WebContent[765]: BUG in libdispatch: 13F1077 - 2899 - 0x4
6/15/15 12:15:56.216 AM com.apple.launchd[1]: (com.apple.WebKit.WebContent.84EA8D77-EAAC-4A33-8F08-283E50B42124[765]) Exited with code: 1
6/15/15 12:16:12.079 AM spindump[758]: Saved diag report for powerstats version com.apple.SystemStats.Daily to /Library/Logs/DiagnosticReports/powerstats_2015-06-15-001611_Johns-MacBook-Pro-2.diag
6/15/15 12:20:20.379 AM com.apple.IconServicesAgent[777]: IconServicesAgent launched.
6/15/15 12:20:20.413 AM distnoted[780]: assertion failed: 13F1077: liblaunch.dylib + 25164 [A40A0C7B-3216-39B4-8AE0-B5D3BAF1DA8A]: 0x25
6/15/15 12:20:24.977 AM launchservicesd[70]: Application App:"Terminal" asn:0x0-2e02e pid:412 refs=7 @ 0x7fb112604bd0 tried to be brought forward, but isn't in fPermittedFrontApps ( ( "LSApplication:0x0-0x7f07f pid=775 "SecurityAgent"")), so denying. : LASSession.cp #1481 SetFrontApplication() q=LSSession 100023/0x186b7 queue
6/15/15 12:20:24.977 AM WindowServer[383]: [cps/setfront] Failed setting the front application to Terminal, psn 0x0-0x2e02e, securitySessionID=0x186b7, err=-13066