<div dir="auto">Thanks for starting this thread Nyall. <div dir="auto"><br></div><div dir="auto">Ian not sure if it's relates to the HiDPI changes that occurred recently (e.g maptool cursors becoming small) but I've also noted that since Xmas the canvas is very sluggish when <span style="font-family:sans-serif">panning and zooming</span> on Macosx and burning through many More CPU cycles than 2.18 for the same operations.</div><div dir="auto"><br></div><div dir="auto">Cheers</div><div dir="auto">Jeremy</div></div><div class="gmail_extra"><br><div class="gmail_quote">On 19/02/2018 19:14, "Nyall Dawson" <<a href="mailto:nyall.dawson@gmail.com">nyall.dawson@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hey all (specifically OSX devs)<br>
<br>
>From a few open bug reports we have against the OSX build of 3.0, I<br>
gather that the OSX builds currently are not correctly handling hidpi<br>
screens.<br>
<br>
My understanding is that the builds are silently trying to scale the<br>
UI by pixel doubling/scaling - it's resulting in bugs like<br>
<a href="https://issues.qgis.org/issues/18043" rel="noreferrer" target="_blank">https://issues.qgis.org/<wbr>issues/18043</a>,<br>
<a href="https://issues.qgis.org/issues/17773" rel="noreferrer" target="_blank">https://issues.qgis.org/<wbr>issues/17773</a>, and<br>
<a href="https://issues.qgis.org/issues/15984" rel="noreferrer" target="_blank">https://issues.qgis.org/<wbr>issues/15984</a>.<br>
<br>
Does any OSX expert know why this is happening? I think the automatic<br>
pixel scaling should be switched off - while master isn't perfect with<br>
hidpi screens, it's usable and the benefits of the hidpi<br>
canvas/composer outweigh the remaining issues.<br>
<br>
Plus, I'd rather we use a single approach to hidpi scaling then have<br>
to worry about separate code paths for OSX.<br>
<br>
Nyall<br>
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