To Enable

$ sudo sh -c "/bin/echo -n enabled > /etc/ScreenSharing.launchd"

To Disable

$ sudo rm -rf /etc/ScreenSharing.launchd

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If you have issues occasionally connecting with Mac OS X Mail to a Courier-IMAP server, particularly over SSL, edit /etc/courier-imap/imapd-ssl and /etc/courier-imap/imapd, find the MAXPERIP setting and try increasing it to:

MAXPERIP=10

Once saved, you’ll need to restart the Courier-IMAP server.

Note: the MAXPERIP setting is not even in the imapd-ssl file so I just added it to the end.

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When migrating nameservers to new hosting, don’t forget to update the nameserver ips at your domain registrar.

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Print nvram settings

# nvram -p

Set boot-args to use 64 bit kernel

# nvram boot-args="arch=x86_64"
Don’t forget to add in your existing boot-args to the command above. Using nvram means you don’t need to have to remember to hold down 6 or 4 during booting each time. To go back to the 32 bit kernel, just set the boot-args using nvram without the arch=x86_64 option.

Check if running 64 bit kernel

To check if you’re using the 64 bit kernel, you can run uname -v and check if there is mention of x86_64 in the returned string.

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After lots of searching round I finally worked out where the hell I was going wrong. Just remount /var/tmp with exec temporarily.

$ sudo mount -o remount,exec /var/tmp
$ sudo pecl install <pecl_extension>
$ sudo mount -o remount,noexec /var/tmp


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