<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Sep 4, 2017, at 20:06, Mr Bee via swift-users <<a href="mailto:swift-users@swift.org" class="">swift-users@swift.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><br class=""><div class="gmail_extra"><div class="gmail_quote">2017-09-05 3:47 GMT+07:00 Fritz Anderson via swift-users <span dir="ltr" class=""><<a href="mailto:swift-users@swift.org" target="_blank" class="">swift-users@swift.org</a>></span>:<br class=""><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div style="word-wrap:break-word" class=""><span class="gmail-"><div class=""><div class=""><div class=""><br class="gmail-m_-3447016478152408468Apple-interchange-newline"></div></div></div></span>In your position, I’d go to the Downloads part of <a href="http://swift.org/" target="_blank" class="">Swift.org</a> and fetch the latest build of the Swift 4 toolchain for Mac. (It’s still in flux, but it’ll probably be promoted to latest/stable this month.)<div class=""><br class=""></div><div class="">Install the toolchain. This adds a Toolchains tab to the Components section of the Preferences window. Select Swift 4.0 Snapshot.</div></div></blockquote><div class=""><br class=""></div><div class="">Ok, I'll try it out once Swift 4 is officially released. So, that means Swift 4 will work on Xcode 8, I suppose.</div></div></div></div></div></blockquote><br class=""></div><div>Unfortunately this will only work for pure Swift apps; the support libraries for Foundation, UIKit, etc are built against the Xcode 9 SDKs and will not work with Xcode 8. I'm afraid you're stuck with Swift 3 if you want to make Cocoa or Cocoa Touch apps, at least officially.</div><div><br class=""></div><div>Jordan</div><br class=""></body></html>