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Apple Computing Products:
macOS - Operating System
The new update killed my Mac
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<blockquote data-quote="awirz" data-source="post: 815110" data-attributes="member: 87547"><p>Hi Mike,</p><p></p><p>I had several Macs that had startup or other weird problems after installing a security update! The security updates install updated code for a broad variety of programs and frameworks. Just look at <span style="color: blue">install.log in the console</span> program (show the log list by clicking the Logs button at the top left of the tool bar and unfold the /var/log list) and enter "install:" in the search field.</p><p></p><p>The <span style="color: Red">"about 20+ lines or so" can be extremely important</span> in determining what is going wrong! If you get any <span style="color: Blue">errors when starting to enter single user mode</span> it would also be handy for me to know about. If the following does not get you anywhere then PLEASE submit as much of these errors as possible.</p><p></p><p>Now let's do something! Please make sure to enter the commands exactly as given. First start your Mac pressing Cmd-S which takes you into single user mode. Then enter the 2 following commands you know already (they fix and prepare the harddisk, <span style="color: Red">notice the space between -uw and the slash</span> in the 2nd command!):</p><p><span style="color: Blue">/sbin/fsck -fy</span></p><p><span style="color: Blue">/sbin/mount -uw /</span></p><p><span style="color: Blue"></span></p><p>Now we are going to delete 2 extension cache files that may prevent your Mac from running properly:</p><p><span style="color: blue">cd /System/Library</span></p><p><span style="color: blue">rm Extensions.kextcache</span></p><p><span style="color: blue">rm Extensions.mkext</span></p><p></p><p>Please make sure you enter the directories of the following commands EXACTLY as given!</p><p>Now we are going to delete some operational cache files (check whether you are <span style="color: Red">in the CORRECT directory</span> using the <span style="color: red">pwd</span> command!):</p><p><span style="color: Blue">cd /Library/Caches</span></p><p><span style="color: Blue">pwd</span></p><p><span style="color: Blue">rm -R *</span></p><p></p><p>Now we are going to delete some system cache files (check whether you are <span style="color: Red">in the CORRECT directory</span> using the <span style="color: red">pwd</span> command!):</p><p><span style="color: blue">cd /System/Library/Caches</span></p><p><span style="color: blue">pwd</span></p><p><span style="color: blue">rm -R *</span></p><p><span style="color: blue">cd /var/db</span></p><p><span style="color: blue">pwd</span></p><p><span style="color: blue">rm BootCache.playlist</span></p><p></p><p>continue system start:</p><p>sh /etc/rc</p><p></p><p>Good luck <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> Adrian</p></blockquote><p></p>
[QUOTE="awirz, post: 815110, member: 87547"] Hi Mike, I had several Macs that had startup or other weird problems after installing a security update! The security updates install updated code for a broad variety of programs and frameworks. Just look at [COLOR="blue"]install.log in the console[/COLOR] program (show the log list by clicking the Logs button at the top left of the tool bar and unfold the /var/log list) and enter "install:" in the search field. The [COLOR="Red"]"about 20+ lines or so" can be extremely important[/COLOR] in determining what is going wrong! If you get any [COLOR="Blue"]errors when starting to enter single user mode[/COLOR] it would also be handy for me to know about. If the following does not get you anywhere then PLEASE submit as much of these errors as possible. Now let's do something! Please make sure to enter the commands exactly as given. First start your Mac pressing Cmd-S which takes you into single user mode. Then enter the 2 following commands you know already (they fix and prepare the harddisk, [COLOR="Red"]notice the space between -uw and the slash[/COLOR] in the 2nd command!): [COLOR="Blue"]/sbin/fsck -fy /sbin/mount -uw / [/COLOR] Now we are going to delete 2 extension cache files that may prevent your Mac from running properly: [COLOR="blue"]cd /System/Library rm Extensions.kextcache rm Extensions.mkext[/COLOR] Please make sure you enter the directories of the following commands EXACTLY as given! Now we are going to delete some operational cache files (check whether you are [COLOR="Red"]in the CORRECT directory[/COLOR] using the [COLOR="red"]pwd[/COLOR] command!): [COLOR="Blue"]cd /Library/Caches pwd rm -R *[/COLOR] Now we are going to delete some system cache files (check whether you are [COLOR="Red"]in the CORRECT directory[/COLOR] using the [COLOR="red"]pwd[/COLOR] command!): [COLOR="blue"]cd /System/Library/Caches pwd rm -R * cd /var/db pwd rm BootCache.playlist[/COLOR] continue system start: sh /etc/rc Good luck :) Adrian [/QUOTE]
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The new update killed my Mac
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