Hi,<br><br>Pharo 4 might be hard on MacOS Sierra.<br><br>There was a late change to the VM, at least for Squeak, to stop the black screen on startup on Sierra.��� Pharo 4 was before that change, and, for that matter, before Sierra.� Pharo 5 was after and clearly has that change.<br><br>I'm pretty sure that the patches are one of these two:<br><br><a href="https://github.com/OpenSmalltalk/opensmalltalk-vm/commit/70ada3a6e4983891a5dae08f04169fd661a74913">https://github.com/OpenSmalltalk/opensmalltalk-vm/...</a><br><br><br><a href="https://github.com/OpenSmalltalk/opensmalltalk-vm/commit/f2b5cf27f81e50c65537972a89ddee9e0aac39c2">https://github.com/OpenSmalltalk/opensmalltalk-vm/...</a><br><br><span class="redactor-invisible-space"><br>and I'm almost 100% sure that the second is the magic one.<br></span><br><br>The simple solution would be to replace the VM in the Pharo 4 bundle with the VM in the Pharo 5 bundle, but, alas, the VM in the Pharo 5 bundle can't read the image from Pharo 4.<br><br>So it would look as if one's choices are:<br><br>* Build the version of the VM from the Pharo 4 bundle, but, apply one or both of the patches above.<br>* Figure out why Pharo 4 is necessary and move to Pharo 5.<br>* Run a squeak V3 VM and hack something together.� This might not give the full Pharo experience.<br><br>To run the squeak V3 do the following:<br><br>Download and unzip the newest Squeak V3 VM.<br><br><a href="https://bintray.com/opensmalltalk/vm/download_file?file_path=cog_macos32x86_squeak.cog.v3_201701140950.tar.gz">https://bintray.com/opensmalltalk/vm/download_file...</a><br><br>Alt click on the CocoaFast app and choose open.<br>Quit.<br><br>Download Pharo 4.� Alt click on Pharo 4 and choose "Show Package Contents."� Navigate to Contents -&gt; Resources.� Drag the "Pharo4.0.image" overtop the CocoaFast app and it launches.� You do have startup errors, so, you now have some time to play around.<br><br>I realize that neither look so easy, though the second one is probably the wisest just because the Pharo group moves quickly.<br><br>cheers<br><br>bruce<br><br><br><i>14 janvier 2017 12:19 Hilaire &lt;hilaire@drgeo.eu&gt; a �crit:</i> <blockquote class="infmailquote" id="inf_quote_0">I don't know yet Jeff. I don't have either a macos sierra at hand. Once <br> a Mac OS Sierra user reported me the problem your are mentioning[1], but <br> I did not get very far investigating the problem. <br>  <br> For me it is not clear at all from[2] if there is any Mac VM 4.0. May be <br> Esteban can enlighten us. <br>  <br> [1] <a href="http://forum.drgeo.eu/DrGeo-pb-mac-os-Sierra-td4024957.html">http://forum.drgeo.eu/DrGeo-pb-mac-os-Sierra-td402...</a> <br> [2] <a href="http://pharo.org/download">http://pharo.org/download</a> <br> Le 14/01/2017 � 11:35, J.F. Rick a �crit : <br> &gt; So, what's the proper procedure? I just moved my Pharo4 to the <br> &gt; Application directory and it didn't work? Launched but the window is <br> &gt; black. Is there a new Pharo4 VM for MacOS? If so, where is it? <br> &gt;  <br> &gt; Thanks, <br> &gt;  <br> &gt; Jeff <br>  <br> --  <br> Dr. Geo <br> <a href="http://drgeo.eu">http://drgeo.eu</a> <br>  <br>  <br> </blockquote><br><br> <div id="editorUserSignature" style="display:none;"> </div>