Unfortunately, macOS Sierra will likely outdate the current Citrix Receiver installed on your Mac computer, as your current Citrix Receiver was built before the latest Mac.

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• NPWLPG • McGraw Hill Chemdraw Plugin 12.0.3.1267 • The plug-in allows you to open and edit files using Microsoft Office applications • Office Authorization plug-in for NPAPI browsers. Can you post a link to a publicly accessible page that doesn't require authentication (signing on)? Can you reach this page via a normal http connection in case the server isn't set up properly? You may have to use 'Forget About This Site' to make Firefox use a http connection.

You can try to test if there is a problem with TLS by temporarily disabling TLS. You can set the security.tls.version.min and security.tls.version.max prefs to 0 to disable TLS (0 means SSL3). You may need to close and restart Firefox after changing these prefs. Security.tls.version.min = 0 security.tls.version.max = 0 • 0 means SSL 3.0, 1 means TLS 1.0, 2 means TLS 1.1, etc.

• Note that this is only meant as a quick test and you should reset the two prefs afterward. Can you post a link to a publicly accessible page that doesn't require authentication (signing on)? Can you reach this page via a normal http connection in case the server isn't set up properly? You may have to use 'Forget About This Site' to make Firefox use a http connection. You can try to test if there is a problem with TLS by temporarily disabling TLS.

You can set the security.tls.version.min and security.tls.version.max prefs to 0 to disable TLS (0 means SSL3). You may need to close and restart Firefox after changing these prefs. Security.tls.version.min = 0 security.tls.version.max = 0 *means SSL 3.0, 1 means TLS 1.0, 2 means TLS 1.1, etc. *Note that this is only meant as a quick test and you should reset the two prefs afterward.

That link works fine for me. I'm not seeing any error message.

What are the connection settings? *Tools > Options > Advanced > Network: Connection > Settings *If you do not need to use a proxy to connect to internet then try to select 'No Proxy' if 'Use the system proxy settings' or one of the others do not work properly. See 'Firefox connection settings': *---- *http://kb.mozillazine.org/Error_loading_websites.

Uninstalling legacy Citrix clients from Windows On the Windows platform, there are some known issues when running the Citrix Receiver installer when a legacy Citrix client is already installed. In many cases, the installer just upgrades the legacy client without issue. However, Citrix has released many different clients with many different names, in many versions over the years.

Occasionally, the Citrix Receiver installer cannot complete the upgrade because it doesn't recognize a legacy client. Remnants of the legacy client can causes conflicts when the Citrix Receiver installer runs. The safe course of action is to uninstall any previous Citrix clients on your Windows machine before running the Citrix Receiver installer. • Open Control Panel All Programs/Programs and click any older Citrix clients to uninstall them. (The various legacy client names and icons are listed below.) • After uninstalling older clients, try running the Citrix Receiver installer. • If you see installation errors, see the section below about the Citrix Receiver Clean-Up Utility.

The various names for Citrix clients are as follows: • Citrix ICA Client 6.1-9.2 • Citrix Plugin for Hosted Apps 11.0-11.3 • Citrix Online Plugin 12.0-12.3 • Citrix Receiver 3.0-4.0 The icons for previous Citrix clients can be any of the following. What if I've already run the Citrix Receiver installer and an upgrade failed? Citrix has created the to address issues with upgrading to Citrix Receiver. If you are seeing errors or the Citrix Receiver isn't working properly after installation, follow the steps below: • Uninstall any older Citrix clients (see icons above) AND the Citrix Receiver.

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