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+other: 0.672
+graphic: 0.666
+device: 0.666
+semantic: 0.577
+instruction: 0.569
+mistranslation: 0.476
+boot: 0.464
+network: 0.445
+vnc: 0.423
+socket: 0.360
+KVM: 0.155
+assembly: 0.118
+
+Cocoa display hangs on macOS 10.15 (Catalina)
+
+I have downloaded the latest stable source tarball 4.1.0 and compiled it (i386-softmmu target).
+
+After opening a black window, QEMU hangs (spinning beach ball).
+When building with `--disable-cocoa --enable-sdl`, display seems to work fine.
+
+The same happened when I tried to build QEMU through HomeBrew and MacPorts.
+
+I am also affected by this after upgrading to 10.15 Catalina.
+
+I experience the same behavior using `qemu-system-x86_64`, but I can't confirm whether other systems are also affected.
+
+Building with SDL also fixed it for me so far:
+
+* `brew edit`
+* add `depends_on "sdl2"` among other dependencies
+* replace `--enable-cocoa` with `--disable-cocoa`
+* replace `--disable-sdl` with `--enable-sdl`
+* save, quit, and `brew install --build-from-source qemu`
+
+I tried with `--enable-gtk` and it hangs as well.
+Using gtk3 build from MacPorts with `+quartz`. Now, this may be a systemwide problem with Gtk, I am yet to test other Gtk apps on Catalina.
+
+Investigation/patches would be welcome. Only one or two active upstream QEMU devs use OSX, and certainly personally I don't propose to upgrade to Catalina for at least six months to a year or so.
+
+
+Hikaru Nishida kindly wrote a patch which should fix this:
+https://<email address hidden>/
+
+
+This is wonderful! Thank you Peter and Hikaru for this patch. I will try it ASAP and confirm.
+
+Yes, works perfectly!
+
+Hikaru's patch is now in master as commit dff742ad27efa4, and will be in the next QEMU release.
+
+