<html><head><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Yea. Short answer: DON'T.<div><br></div><div>Long answer: Mac OS does not support union mounts. They're there, they are honored by posix programs, but everything that using the apple file system interface bypasses it.</div><div><br></div><div>Which means that just about anything based on cocoa framekworks ... optimizes and bypasses union mount visibility.</div><div><br></div><div>I ran into this back on 10.7, and complained, only to get basically this back from apple support engineers.</div><div><br></div><div><br><div><div>On 2018-12-16, at 8:03 AM, Ces VLC <<a href="mailto:cesarillovlc@gmail.com">cesarillovlc@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div dir="ltr">Hi!<div><br></div><div>Sorry for this partially off-topic post, but couldn't imagine another place with more people likely to having experiences with little known MacOS UNIX features than this.</div><div><br></div><div>In order to ease the testing of some builds, I had the idea of using union mounts ("mount -o union") to merge several DMGs together in the same folder.</div><div><br></div><div>But I'm a bit afraid because it seems to be a little used feature in the Mac, so, if I'll be the only one in the planet using it, I guess it can be like sort of a minefield walk, likely to use little-tested stuff.</div><div><br></div><div>I searched for it, and the only problems I saw reported is that Finder doesn't seem to honor union mounts, but that wouldn't be a problem for me, as I won't be using Finder for browsing the mount directory. If it works fine at the Terminal, then it's fine for me.</div><div><br></div><div>Do you have any experience using union mounts on MacOS? Did it work fine for you? Did you find any problem/issues?</div><div><br></div><div>Thanks!</div><div><br></div><div>César</div><div><br></div><div><br></div><div><br></div><div> </div></div>
</blockquote></div><br><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: 'Helvetica Neue'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: 'Helvetica Neue'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: 'Helvetica Neue'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: 'Helvetica Neue'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><span class="Apple-style-span" style="font-family: Helvetica; "><div>---</div><div>Entertaining minecraft videos</div><div><a href="http://YouTube.com/keybounce">http://YouTube.com/keybounce</a></div></span></span></div></span></div></span></span>
</div>
<br></div></body></html>