* **Microsoft:** Following command pulls all certificates from Windows Update services: ``CertUtil -syncWithWU -f -f . `` (see also http://aka.ms/RootCertDownload, https://technet.microsoft.com/en-us/library/dn265983(v=ws.11).aspx#BKMK_CertUtilOptions).
* **Apple:**
1.__System:__ from Apple OS X keychain app. Open Keychain Access utility, i.e.
In the Finder window, under Favorites --> "Applications" --> "Utilities"
2.__Internet:__ Pick the latest subdir (=highest number) from https://opensource.apple.com/source/security_certificates/. They are in DER format despite their file extension. Download them with ``wget --level=1 --cut-dirs=5 --mirror --convert-links --adjust-extension --page-requisites --no-parent https://opensource.apple.com/source/security_certificates/security_certificates-<latest>/certificates/roots/``. Then: ``for f in *.cer *.crt; do echo $f >/dev/stderr; openssl x509 -in $f -inform DER -outform PEM ;done >/tmp/Apple.pem``
If you want to check trust against e.g. a company internal CA you need to use ``./testssl.sh --add-ca companyCA1.pem,companyCA2.pem <further_cmds>`` or ``ADDTL_CA_FILES=companyCA1.pem,companyCA2.pem ./testssl.sh <further_cmds>``.