Trusting the Physical Sciences Root CA in OS X
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Step 1.
Option-Click here and
click "Save Linked File to the Desktop" to download the Physical
Sciences Root CA Certificate to your computer.
![](0_save_ps_root_cert_to_desktop.png)
Step 2.
Press Apple-F and search for keychain. Doubleclick on the application 'Keychain Access'.
![](1_find_keychain_access.png)
Step 3.
From the File menu select 'Import Items'.
![](2_file_import.png)
Step 4.
From the Desktop select the file you just saved, psrootca.reg. Make sure the Destination Keychain
says 'login', and click Open.
![](3_select_psrootca_from_desktop.png)
Step 5.
Click 'Always Trust'.
![](4_click_always_trust.png)
Step 6.
Enter your password to save the keychain change.
![](5_enter_password.png)
Step 7.
Double click on 'Physical Sciences Root Certificate' which is now in the 'login' keychain.
![](6_doubleclick_phys_sci_root.png)
Step 8.
Click the triangle to the left of Trust to view the trust settings. Set the top pulldown ('When using this certificate') to 'Always Trust'. Click the red X to save changes. You will have to enter your password one more time.
![](7_set_to_always_trust.png)