Why, all of a sudden @MojangSupport , is my launcher not opening on my (very)old mac ? It was fine last week. I have reinstalled. I have opened the package. My launch code thingy looks different to @sunny_dusty s on her video (which was excellent btw thank you)

There may be a corrupt file at play or something could be causing issues like antivirus/firewall! Start there by uninstalling and then checking those two to make sure Minecraft has exceptions. ^TK

Thanks I’ll take a look. Strange though that last week no issues.