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I apologize if this topic has been addressed previously and maybe El Capitan is not supported. For me Cura 3.5, 3.6 Beta and 3.6 perform excruciatingly slowly with El Capitan on my iMac i3 3.06GHz, 12GB RAM and SSD. Unuseable except for very basic functionality, like "load model", and "Prepare". Almost every interaction pegs the cpu at 100% +, sometimes for minutes.  Keystrokes and mouse clicks appear to take about a second to register before any feedback, and attempting to scroll through profile settings is a daunting operation with the program at times becoming entirely unresponsive, requiring a Forced Quit and restart. For my own curiosity I installed Cura 3.6 on a Surface Pro II w/4GB RAM running Windows 10. The program performance is fast and responsive is immediate.   I am curious if others are seeing the performance issue on El Capitan, and if anyone has any tuning recommendations (besides upgrading my hardware ...).  

So, I tried again, manually removing "M104 T1 S0" from my g-code. Now it prints fine. So:   Good: I know whats wrong Bad: Why is Cura adding this line mid-print?   Summary:  - I load a file with support and print everything with extruder 1. No issues.  - Same file but I select the support to be printed with extruder 2 -> Cura adds "M104 T1 S0" to the g-code. Mid print the nozzel temperature goes to zero and the extruders blocks. Printer keeps going.    Anybody? As I print dual feed nozzel I have all temperatures set to 200. Incl the standby once. And I use Cura 3.6.0    

Hallo ich spreche leider so gut wie kein Englisch, daher im deutschen Forum Ich habe einen Geeetech A30 Drucker Die downgeloadeten Beispieldateien hat der Drucker schön in die Mitte gedruckt. Ich habe die Heizbettgröße 320x32x420 eingestellt Wenn ich meine eigene Konstruktion mit Cora in die Mitte setze druckt er neben das HEizbett. Gerade einen neuen Versuch gestartet. Da habe ich meine Konstuktion in die hintere rechte Ecke gesetzt. Nun druckt er tatsächlich nicht mehr neben das Heizbett, jedoch befindet sich der Ausdruck nun im linken unteren Drittel. Kann man irgendwo bei Cura den Bezugspunkt einstellen, und die "Wirkrichtung" x- ist bei mir wenn x ganz nach hinten gefahren ist. ist das auch einstellbar ???? Zuerst hatte ich 1/4 Jahr Hardwareprobleme... nun würde ich gerne mal meine Eigenkonstuktion ausdrucken Vielen Dank schon mal Jürgen  

OK. Thanks for checking that. I installed Cura 3.6 on my Macbook and, sure enough, it's not there. I'm unclear on what I actually did to get it to appear in the list, but at least I know the problem is on my end. Sorry for the confusion.

Hello   I cannot help you with your specific question, but I think you should ask this question also in the Github area of Cura, because there are more developers available than here.