<div dir="ltr"><div style="font-family:Helvetica;font-size:14px;color:rgb(14,16,26);margin-top:0pt;margin-bottom:0pt"><span style="margin-top:0pt;margin-bottom:0pt">Hi,</span></div><div style="font-family:Helvetica;font-size:14px;color:rgb(14,16,26);margin-top:0pt;margin-bottom:0pt"><br></div><div style="font-family:Helvetica;font-size:14px;color:rgb(14,16,26);margin-top:0pt;margin-bottom:0pt"><span style="margin-top:0pt;margin-bottom:0pt">  I have a question about the new version of py-cryptography and compatibility with older macOS versions.</span></div><div style="font-family:Helvetica;font-size:14px;color:rgb(14,16,26);margin-top:0pt;margin-bottom:0pt"><span style="margin-top:0pt;margin-bottom:0pt">  How to properly handle a case when a new version explicitly drops support for older macOS?</span></div><div style="font-family:Helvetica;font-size:14px;color:rgb(14,16,26);margin-top:0pt;margin-bottom:0pt"><br></div><div style="font-family:Helvetica;font-size:14px;color:rgb(14,16,26);margin-top:0pt;margin-bottom:0pt"><span style="margin-top:0pt;margin-bottom:0pt">  Excerpt from </span><a target="_blank" href="https://cryptography.io/en/latest/changelog/#v3-0" class="editor-rtfLink" style="margin-top:0pt;margin-bottom:0pt;color:rgb(74,110,224)"><span style="margin-top:0pt;margin-bottom:0pt">https://cryptography.io/en/latest/changelog/#v3-0</span></a><span style="margin-top:0pt;margin-bottom:0pt">:</span></div><div style="font-family:Helvetica;font-size:14px;color:rgb(14,16,26);margin-top:0pt;margin-bottom:0pt"><span style="margin-top:0pt;margin-bottom:0pt">   <font face="Courier New">BACKWARDS INCOMPATIBLE: Dropped support for macOS 10.9, macOS users must upgrade to 10.10 or newer.</font></span></div><p style="font-family:Helvetica;font-size:14px;color:rgb(14,16,26);margin-top:0pt;margin-bottom:0pt"><span style="margin-top:0pt;margin-bottom:0pt">  </span></p><div style="font-family:Helvetica;font-size:14px;color:rgb(14,16,26);margin-top:0pt;margin-bottom:0pt"><span style="margin-top:0pt;margin-bottom:0pt">— </span></div><div style="font-family:Helvetica;font-size:14px;color:rgb(14,16,26);margin-top:0pt;margin-bottom:0pt"><span style="margin-top:0pt;margin-bottom:0pt">Andrey Stromnov</span></div></div>