无法打开Unity 5.6.1旧项目，求助排查问题原因

环境信息 #

• 系统：macOS Monterey 12.4
• Unity Hub：3.3.0
• Unity版本：5.6.1f1（已安装Android Build Support）

问题现象 #

尝试打开旧Unity项目时无响应：最初几次尝试会弹出黑色窗口，现在仅Dock栏显示Unity图标，无任何错误提示，Hub日志仅包含info级内容（日志内容如下）。

日志内容 #

{"timestamp":"2022-09-15T07:43:22.167Z","level":"info","moduleName":"LaunchProcess","message":"[ 'child process exited with code 0' ]"}
{"timestamp":"2022-09-15T07:43:25.101Z","level":"info","moduleName":"LaunchProcess","message":"[ 'child process exited with code 0' ]"}
{"timestamp":"2022-09-15T07:43:26.103Z","level":"info","moduleName":"LicensingSdkService","message":"[ 'checkEntitlements: checking entitlements for: com.unity.editor.ui' ]"}
{"timestamp":"2022-09-15T07:43:26.120Z","level":"info","moduleName":"LicensingSdkService","message":"[ 'Successfully checked for entitlements request.' ]"}
{"timestamp":"2022-09-15T07:43:26.122Z","level":"info","moduleName":"LocalProjectService","message":"[\n  'openProject projectPath: /Users/apple/Documents/Unity/Really_Old_File_0815_DB, current editor:',\n  undefined\n]"}
{"timestamp":"2022-09-15T07:43:26.123Z","level":"info","moduleName":"RestEvent:Project","message":"[\n  'onProjectOpen data:',\n  {\n    projectPath: '/Users/apple/Documents/Unity/Really_Old_File_0815_DB',\n    normalizedProjectPath: '/Users/apple/Documents/Unity/Really_Old_File_0815_DB'\n  }\n]"}
{"timestamp":"2022-09-15T07:43:26.123Z","level":"info","moduleName":"LicensingSdkService","message":"[ 'checkEntitlements: checking entitlements for: com.unity.editor.ui' ]"}
{"timestamp":"2022-09-15T07:43:26.134Z","level":"info","moduleName":"LicensingSdkService","message":"[ 'Successfully checked for entitlements request.' ]"}
{"timestamp":"2022-09-15T07:43:26.134Z","level":"info","moduleName":"LaunchProcess","message":"[\n  'Spawning editor instance with command: ',\n  '/Applications/Unity/Hub/Editor/5.6.1f1/Unity.app/Contents/MacOS/Unity',\n  ', and arguments: ',\n  [\n    '-projectpath',\n    '/Users/apple/Documents/Unity/Really_Old_File_0815_DB',\n    '-useHub',\n    '-hubIPC',\n    '-cloudEnvironment',\n    'production',\n    '-licensingIpc',\n    'LicenseClient-apple',\n    '-hubSessionId',\n    '5b1d8bd0-34a3-11ed-9490-cb13c39bed2b'\n  ]\n]"}
{"timestamp":"2022-09-15T07:43:26.606Z","level":"info","moduleName":"LicensingSdkService","message":"[ 'Get all entitlement groups' ]"}
{"timestamp":"2022-09-15T07:43:26.621Z","level":"info","moduleName":"LicensingSdkService","message":"[ 'Successfully received all entitlement groups details' ]"}
{"timestamp":"2022-09-15T07:43:26.622Z","level":"info","moduleName":"LicensingSdkService","message":"[ 'Received 1 entitlement groups' ]"}
{"timestamp":"2022-09-15T07:43:26.622Z","level":"info","moduleName":"LicensingSdkService","message":"[ 'Get all entitlement groups' ]"}
{"timestamp":"2022-09-15T07:43:26.637Z","level":"info","moduleName":"LicensingSdkService","message":"[ 'Successfully received all entitlement groups details' ]"}
{"timestamp":"2022-09-15T07:43:26.637Z","level":"info","moduleName":"LicensingSdkService","message":"[ 'Received 1 entitlement groups' ]"}

可能原因及排查方向 #

1. 系统兼容性问题 #

Unity 5.6.1f1发布于2017年，与macOS Monterey存在跨版本API兼容风险：

• 右键点击Unity 5.6.1f1应用程序，选择显示包内容，进入Contents/MacOS，直接运行Unity可执行文件，查看终端是否输出错误信息
• 检查系统隐私设置，确保Unity有访问项目文件夹的权限（系统偏好设置>安全性与隐私>文件与文件夹）

2. Unity Hub与旧版本编辑器的兼容性 #

Unity Hub 3.3.0对早期Unity版本的支持存在缺陷：

• 绕过Unity Hub，直接从Unity安装目录启动编辑器，再通过编辑器内置的打开项目功能选择目标项目
• 降级Unity Hub到2.x版本（对旧版Unity适配性更好），再尝试打开项目

3. 项目文件损坏或配置冲突 #

• 复制项目到新目录，排除原路径权限问题
• 删除项目根目录下的Library文件夹（Unity会自动重新生成），再尝试打开
• 检查项目中的第三方插件，尤其是针对旧系统开发的插件，可能在Monterey下无法加载导致崩溃

4. 显卡驱动或图形API问题 #

Unity 5.6默认使用的旧版OpenGL在macOS Monterey中支持有限：
打开终端，进入Unity安装目录的MacOS文件夹，执行命令：./Unity -projectpath "/Users/apple/Documents/Unity/Really_Old_File_0815_DB" -force-glcore，强制使用现代OpenGL核心模式启动

内容的提问来源于stack exchange，提问作者The Blind Hawk