/Library/Developer/CommandLineTools. If not present, CLT isn't installed anyway.
PATH="/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/libexec"; export PATH; m4 --version
GNU M4 1.4.6 Copyright (C) 2006 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.Written by Rene' Seindal.
Allowbutton in System Preferences > Security & Privacy. Click the button, enable the kernel extension if asked for, and then reboot.
Security & Privacypreference pane and click
Enable system extensions..., then click
Optionsbutton leading to that.
Utilities, then select
Startup Security Utility.
Reduced Security, then enable:
Allow user management of kernel extensions from identified developers.
Open Security Preferences.
Allow driver in system settingsand trigger macOS into showing the much-coveted
Allow. You'll need to reboot once more, and then you're done.
sudo /usr/bin/kmutil load -p /Library/Extensions/ATTOExpressSASHBA2.kext
sudo kextload /Library/Extensions/ATTOExpressSASHBA2.kext
sudo /usr/bin/kmutil load -p /Library/Filesystems/macfuse.fs/Contents/Extensions/11/macfuse.kext
Shift+Command+Gand go to
ATTOSASHBA*.kextin that folder (password required, most of the time)
sudo kextcache --clear-staging(password required)
system policy prevents loadingand/or doesn't load macFUSE, your computer is very likely under IT management policies that prevent kernel extensions from loading. Talk to your IT department first, they'll know what to do.
System Information.app. You should see at least two entries:
Hardware > Thunderbolt: mTape, Sonnet, MagStor, etc.
Hardware > SAS: Ultrium, IBM, HP, Quantum
SAS, power cycle the Thunderbolt device and the LTO drive. If you're still not seeing anything listed under
SAS, restart your Mac.