问题1. “macOS Catalina” could not be verified， 在”系统偏好设置 ” -> “软件更新”下下载完catalina更新包后点安装，提示 “macOS Catalina” could not be verified.
解决办法：打开“ 系统偏好设置”->“日期与时间”->去掉打勾”自动设置日期与时间”, 重启机器，并再次软件更新并安装。
Go to settings then date&time. Click and then unclick “set date and time automatically”. Save the changes by clicking the lock.
Then restart the computer and proceed to download the update once again through settings and software update. It resolved the issue of the update not being verified.
问题2. macos catalina安装完，打开xcode时，提示“An unknown error occurred. See the install log for more details.”
If you are also using Supervisor to monitor and heal your long running Python projects and observed that output of your program is not being logged to stdout_logfile, it is because Python print statement does not automatically flush output to STDOUT.
One solution is using sys.stdout.flush() frequently to flush the output or if you are using Python 3.3, print(msg, flush=True) is another solution. However, a better solution is to run python with -u parameter (unbuffered mode).
开发xcode下已经使用 “Automatically manage signing”,还提示“is automatically signed, but provisioning profile 1fe1af09-c71e-4300-94d8-76d14cec2eb4 has been manually specified. Set the provisioning profile value to “Automatic” in the build settings editor, or switch to manual signing in the Signing & Capabilities editor.”解决方案已关闭评论
XXXXXX is automatically signed, but provisioning profile 1fe1af09-c71e-4300-94d8-76d14cec2eb4 has been manually specified. Set the provisioning profile value to “Automatic” in the build settings editor, or switch to manual signing in the Signing & Capabilities editor.