Can't Download Skype For Mac

2409256 You can't connect to Skype for Business Online, or certain features don't work, because an on-premises firewall blocks the connection MORE INFORMATION Generally, if the menu option to send a file isn't available, this means that the administrator has disabled file transfer capabilities for that user.

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Read this topic to learn about hardware, software, and infrastructure requirements for running Skype for Business on a Mac.

The Skype for Business on Mac Client is available for download.

Hardware and software requirements for Skype for Business on Mac

The Skype for Business on Mac client requires Mac OS X El Capitan and higher, and uses at least 100MB of disk space. We support the use of all built-in audio and video devices. External devices must be in the Skype for Business Solutions Catalog.

Note

This list is preliminary and some devices may be qualified for Lync, but not supported on Skype for Business on the Mac.Refer to the System requirements for the minimum hardware required.

Legacy Mac clients

Skype for Business Server 2015 also supports the following legacy clients on computers that are running Mac OS 10.5.8 or latest service pack or release (Intel-based) operating systems (Mac OS 10.9 operating system is not currently supported). For details about supported features, see Desktop client feature comparison for Skype for Business.

  • Microsoft Lync for Mac 2011 (see Lync for Mac 2011 Deployment Guide)

  • Microsoft Communicator for Mac 2011 (see Communicator for Mac 2011 Deployment Guide)

These clients are not supported by Skype for Business Server 2019.

Infrastructure requirements for Skype for Business on Mac

The Skype for Business on Mac client leverages both the Unified Communications Management Platform (UCMP) as well as the Unified Communications Web API (UCWA) that our mobility clients use.

The client has the same requirements as our mobility clients in that you must have an Access Edge Server and Reverse Proxy deployed in a supported configuration.

Authentication

The Skype for Business on Mac client supports Cert-based authentication, Microsoft Modern Authentication, and Multi-Factor Authentication when deployed and enabled.

Note

Due to a current limitation, the user's Exchange credentials must be the same as their Skype for Business credentials.

Certificates

Download Skype For Mac 10.6.8

Certificates in use on the Access Edge, Reverse Proxy and Front End servers must not use the SHA-512 hash algorithm.

The HTTP Certificate Revocation List must be defined and accessible by the client. For example, we don't support an LDAP entry in the certificate as your Certificate Revocation List.

DNS

Can

Mobility must be properly deployed for the Skype for Business on the Mac client to function properly. A common failure scenario is to have both of the following DNS entries resolvable on the internal network:

  • lyncdiscoverinternal.<sipdomain>

  • lyncdiscover.<sipdomain>

For more information, refer to: Deploying Mobility in Lync Server 2013, and the Microsoft Lync Server 2010 Mobility Guide.

See also

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Problem

Assume that in an Office 365 environment, you try to send or receive files or attachments in Lync through Skype for Business Online (formerly Lync Online). In this situation, you may experience the following issues:

  • You can't send files to contacts.
  • You can't receive files from contacts.
  • You can't upload file attachments in Skype for Business Online meetings.
  • When you send files to contacts, you receive an error message.
  • You can’t send pictures directly in an Instant Messaging (IM) conversation.

Solution

For Skype for Business Online users

If you receive an error message when you send or receive files, make sure that the file type being transferred isn’t one of those that is listed in the 'More Information' section.

For Skype for Business Online administrators

If a user doesn’t see the option to transfer files, verify that file transfer capabilities are enabled for that user.

Firewalled networks must meet the network requirements for Skype for Business Online. For more information about Skype for Business Online network requirements, go to the following Microsoft Knowledge Base article:

2409256 You can't connect to Skype for Business Online, or certain features don't work, because an on-premises firewall blocks the connection

More Information

Generally, if the menu option to send a file isn't available, this means that the administrator has disabled file transfer capabilities for that user.

If your attempts to upload attachments to a conference or to send files to a contact generate an error message, this means either that the contact that you’re sending the attachment to doesn’t have permission to receive files or that the file type is blocked.

In Skype for Business Online, certain files types are blocked by the Intelligent Instant Message Filter (IIMF) application. IIMF helps protect Skype for Business Online users against the most common forms of viruses without degrading the user experience.

Transferring files to Skype contacts isn't supported.

Why Can't I Download Skype

By default, Skype for Business Online is configured to prevent users from sending files through IM that have the following file name extensions:

.ade, .adp, .app, .asp, .bas, .bat, .cer, .chm, .cmd, .com, .cpl, .crt, .csh, .exe, .fxp, .grp, .hlp, .hta, .inf, .ins, .isp, .its, .js, .jse, .ksh, .lnk, .mad, .maf, .mag, .mam, .maq, .mar, .mas, .mat, .mau, .mav, .maw, .mda, .mdb, .mde, .mdt, .mdw, .mdz, .msc, .msi, .msp, .mst, .ocx, .ops, .pcd, .pif, .pl, .pnp, .prf, .prg, .pst, .reg, .scf, .scr, .sct, .shb, .shs, .tmp, .url, .vb, .vbe, .vbs, .vsd, .vsmacros, .vss, .vst, .vsw, .ws, .wsc, .wsf, .wsh

Can't Download Skype

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

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