# Boot Issue in Mac OS **URL:** \ **Category:** Support, Help & Resources\ **Created:** [September 15, 2025, 6:24pm UTC](https://in-thread.sonic-pi.net/t/boot-issue-in-mac-os/9853 "2025-09-15T18:24:44Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![delmanks](https://dub1.discourse-cdn.com/flex017/user_avatar/in-thread.sonic-pi.net/delmanks/32/3017_2.png) [@delmanks](https://in-thread.sonic-pi.net/u/delmanks)\ **Post date:** [September 15, 2025, 6:24pm UTC](https://in-thread.sonic-pi.net/t/boot-issue-in-mac-os/9853/1 "2025-09-15T18:24:45Z")
Just installed Sonic Pi - it will not open even after restarting my computer (no other programs open). Running on a Mac Intel Sequoia OS here’s the error message: **Apologies, unable to start…** Sorry, Sonic Pi is having issues booting: ```ruby GUI was unable to connect to the Ruby server. ``` Please consider reporting a bug at [http://github.com/samaaron/sonic-pi/issues](http://github.com/samaaron/sonic-pi/issues) **System Information** Sonic Pi version: 4.6.0 OS: macOS Sequoia (15.6) CPU: x86\_64 **gui.log** ```ruby [API] [INFO] : Args: /Applications/Sonic Pi.app/Contents/Resources/app/server/native/ruby/bin/ruby /Applications/Sonic Pi.app/Contents/Resources/app/server/ruby/bin/clear-logs.rb ``` ```ruby [API] [INFO] : Started... ``` ```ruby [API] [INFO] : Starting... ``` ```ruby [API] [INFO] : Log Path: /Users/melissadaneke/.sonic-pi/log ``` ```ruby [API] [INFO] : Launching Sonic Pi Boot Daemon: ``` ```ruby [API] [INFO] : Args: /Applications/Sonic Pi.app/Contents/Resources/app/server/native/ruby/bin/ruby /Applications/Sonic Pi.app/Contents/Resources/app/server/ruby/bin/daemon.rb --no-scsynth-inputs ``` ```ruby [API] [INFO] : Started... ``` ```ruby [API] [INFO] : Reading Boot Daemon output... ``` ```ruby [API] [ERROR] : Error reading ports via Boot Daemon STDOUT. Bytes read: -32 Error code: generic:32 ``` ```ruby [API] [INFO] : Attempting to start Boot Daemon failed.... ``` ```ruby [GUI] - API Boot failed ``` ```ruby [GUI] [i18n] - Looping through preferred ui languages ``` ```ruby [GUI] - Language setting: system_language ``` ```ruby [GUI] - System language: en_US ``` ```ruby [GUI] [i18n] - Looping through preferred ui languages ``` ```ruby [GUI] - Using language: en_US ``` ```ruby [GUI] [i18n] - Loading translations for en_US ``` ```ruby [GUI] [i18n] - Error: Failed to load language translation for en_US ``` ```ruby [GUI] - translations available ``` ```ruby [GUI] - hiding main window ``` ```ruby [GUI] - initialising toolbar icons ``` ```ruby [GUI] - setting up window structure ``` ```ruby [Debug] Adding language combo box entries... ``` ```ruby 54 ``` ```ruby [Debug] Adding language system_language to the combo box ``` ```ruby [Debug] Adding language ar to the combo box ``` ```ruby [Debug] Adding language bg to the combo box ``` ```ruby [Debug] Adding language bn to the combo box ``` ```ruby [Debug] Adding language bs to the combo box ``` ```ruby [Debug] Adding language ca to the combo box ``` ```ruby [Debug] Adding language ca@valencia to the combo box ``` ```ruby [Debug] Adding language cs to the combo box ``` ```ruby [Debug] Adding language da to the combo box ``` ```ruby [Debug] Adding language de to the combo box ``` ```ruby [Debug] Adding language el to the combo box ``` ```ruby [Debug] Adding language en_AU to the combo box ``` ```ruby [Debug] Adding language en_GB to the combo box ``` ```ruby [Debug] Adding language en_US to the combo box ``` ```ruby [Debug] Adding language eo to the combo box ``` ```ruby [Debug] Adding language es to the combo box ``` ```ruby [Debug] Adding language et to the combo box ``` ```ruby [Debug] Adding language eu to the combo box ``` ```ruby [Debug] Adding language fa to the combo box ``` ```ruby [Debug] Adding language fi to the combo box ``` ```ruby [Debug] Adding language fr to the combo box ``` ```ruby [Debug] Adding language ga to the combo box ``` ```ruby [Debug] Adding language gl to the combo box ``` ```ruby [Debug] Adding language he to the combo box ``` ```ruby [Debug] Adding language hi to the combo box ``` ```ruby [Debug] Adding language hu to the combo box ``` ```ruby [Debug] Adding language hy to the combo box ``` ```ruby [Debug] Adding language id to the combo box ``` ```ruby [Debug] Adding language is to the combo box ``` ```ruby [Debug] Adding language it to the combo box ``` ```ruby [Debug] Adding language ja to the combo box ``` ```ruby [Debug] Adding language ka to the combo box ``` ```ruby [Debug] Adding language ko to the combo box ``` ```ruby [Debug] Adding language nb to the combo box ``` ```ruby [Debug] Adding language nl to the combo box ``` ```ruby [Debug] Adding language pl to the combo box ``` ```ruby [Debug] Adding language pt to the combo box ``` ```ruby [Debug] Adding language pt_BR to the combo box ``` ```ruby [Debug] Adding language ro to the combo box ``` ```ruby [Debug] Adding language ru to the combo box ``` ```ruby [Debug] Adding language si to the combo box ``` ```ruby [Debug] Adding language sk to the combo box ``` ```ruby [Debug] Adding language sl to the combo box ``` ```ruby [Debug] Adding language sv to the combo box ``` ```ruby [Debug] Adding language sw to the combo box ``` ```ruby [Debug] Adding language th to the combo box ``` ```ruby [Debug] Adding language tr to the combo box ``` ```ruby [Debug] Adding language ug to the combo box ``` ```ruby [Debug] Adding language uk to the combo box ``` ```ruby [Debug] Adding language vi to the combo box ``` ```ruby [Debug] Adding language zh to the combo box ``` ```ruby [Debug] Adding language zh-Hans to the combo box ``` ```ruby [Debug] Adding language zh_HK to the combo box ``` ```ruby [Debug] Adding language zh_TW to the combo box ``` ```ruby [GUI] - restoring scope states ``` ```ruby [GUI] - creating status bar ``` ```ruby [GUI] - creating info panel ``` ```ruby [GUI] - creating tool bar ``` ```ruby [GUI] - initialising documentation window ``` ```ruby [API] [INFO] : Waiting Until Ready... 59 ``` ```ruby [API] [INFO] : Waiting Until Ready... 58 ``` ```ruby [API] [INFO] : Waiting Until Ready... 57 ``` ```ruby [API] [INFO] : Waiting Until Ready... 56 ``` ```ruby [API] [INFO] : Waiting Until Ready... 55 ``` ```ruby [API] [INFO] : Waiting Until Ready... 54 ``` ```ruby [API] [INFO] : Waiting Until Ready... 53 ``` ```ruby [API] [INFO] : Waiting Until Ready... 52 ``` ```ruby [API] [INFO] : Waiting Until Ready... 51 ``` ```ruby [API] [INFO] : Waiting Until Ready... 50 ``` ```ruby [API] [INFO] : Waiting Until Ready... 49 ``` ```ruby [API] [INFO] : Waiting Until Ready... 48 ``` ```ruby [API] [INFO] : Waiting Until Ready... 47 ``` ```ruby [API] [INFO] : Waiting Until Ready... 46 ``` ```ruby [API] [INFO] : Waiting Until Ready... 45 ``` ```ruby [API] [INFO] : Waiting Until Ready... 44 ``` ```ruby [API] [INFO] : Waiting Until Ready... 43 ``` ```ruby [API] [INFO] : Waiting Until Ready... 42 ``` ```ruby [API] [INFO] : Waiting Until Ready... 41 ``` ```ruby [API] [INFO] : Waiting Until Ready... 40 ``` ```ruby [API] [INFO] : Waiting Until Ready... 39 ``` ```ruby [API] [INFO] : Waiting Until Ready... 38 ``` ```ruby [API] [INFO] : Waiting Until Ready... 37 ``` ```ruby [API] [INFO] : Waiting Until Ready... 36 ``` ```ruby [API] [INFO] : Waiting Until Ready... 35 ``` ```ruby [API] [INFO] : Waiting Until Ready... 34 ``` ```ruby [API] [INFO] : Waiting Until Ready... 33 ``` ```ruby [API] [INFO] : Waiting Until Ready... 32 ``` ```ruby [API] [INFO] : Waiting Until Ready... 31 ``` ```ruby [API] [INFO] : Waiting Until Ready... 30 ``` ```ruby [API] [INFO] : Waiting Until Ready... 29 ``` ```ruby [API] [INFO] : Waiting Until Ready... 28 ``` ```ruby [API] [INFO] : Waiting Until Ready... 27 ``` ```ruby [API] [INFO] : Waiting Until Ready... 26 ``` ```ruby [API] [INFO] : Waiting Until Ready... 25 ``` ```ruby [API] [INFO] : Waiting Until Ready... 24 ``` ```ruby [API] [INFO] : Waiting Until Ready... 23 ``` ```ruby [API] [INFO] : Waiting Until Ready... 22 ``` ```ruby [API] [INFO] : Waiting Until Ready... 21 ``` ```ruby [API] [INFO] : Waiting Until Ready... 20 ``` ```ruby [API] [INFO] : Waiting Until Ready... 19 ``` ```ruby [API] [INFO] : Waiting Until Ready... 18 ``` ```ruby [API] [INFO] : Waiting Until Ready... 17 ``` ```ruby [API] [INFO] : Waiting Until Ready... 16 ``` ```ruby [API] [INFO] : Waiting Until Ready... 15 ``` ```ruby [API] [INFO] : Waiting Until Ready... 14 ``` ```ruby [API] [INFO] : Waiting Until Ready... 13 ``` ```ruby [API] [INFO] : Waiting Until Ready... 12 ``` ```ruby [API] [INFO] : Waiting Until Ready... 11 ``` ```ruby [API] [INFO] : Waiting Until Ready... 10 ``` ```ruby [API] [INFO] : Waiting Until Ready... 9 ``` ```ruby [API] [INFO] : Waiting Until Ready... 8 ``` ```ruby [API] [INFO] : Waiting Until Ready... 7 ``` ```ruby [API] [INFO] : Waiting Until Ready... 6 ``` ```ruby [API] [INFO] : Waiting Until Ready... 5 ``` ```ruby [API] [INFO] : Waiting Until Ready... 4 ``` ```ruby [API] [INFO] : Waiting Until Ready... 3 ``` ```ruby [API] [INFO] : Waiting Until Ready... 2 ``` ```ruby [API] [INFO] : Waiting Until Ready... 1 ``` ```ruby [API] [INFO] : Waiting Until Ready... 0 ``` ```ruby [GUI] - Critical Error. Unable to connect to server.. ``` ```ruby ``` ---
**Author:** ![brendanmac](https://dub1.discourse-cdn.com/flex017/user_avatar/in-thread.sonic-pi.net/brendanmac/32/2809_2.png) [@brendanmac](https://in-thread.sonic-pi.net/u/brendanmac)\ **Post date:** [September 16, 2025, 6:09am UTC](https://in-thread.sonic-pi.net/t/boot-issue-in-mac-os/9853/2 "2025-09-16T06:09:28Z")
Hi If you post this issue via that github link you’ll get a much faster response. I had a similar issue several months ago. PD-Pi ---
**Author:** ![delmanks](https://dub1.discourse-cdn.com/flex017/user_avatar/in-thread.sonic-pi.net/delmanks/32/3017_2.png) [@delmanks](https://in-thread.sonic-pi.net/u/delmanks)\ **Post date:** [September 16, 2025, 2:06pm UTC](https://in-thread.sonic-pi.net/t/boot-issue-in-mac-os/9853/3 "2025-09-16T14:06:20Z")
Would you mind linking where your thread was? I haven’t received a response there yet. ---
**Author:** ![brendanmac](https://dub1.discourse-cdn.com/flex017/user_avatar/in-thread.sonic-pi.net/brendanmac/32/2809_2.png) [@brendanmac](https://in-thread.sonic-pi.net/u/brendanmac)\ **Post date:** [September 16, 2025, 2:12pm UTC](https://in-thread.sonic-pi.net/t/boot-issue-in-mac-os/9853/4 "2025-09-16T14:12:00Z")
I could post a link, but it was for a Windows machine, so probably best to wait for a more specific response - Sam and his dev team are pretty quick to resolve such issues. Also, search here for “Mac OS boot error/issue”. HTH ---
**Author:** ![Tsumutsura](https://dub1.discourse-cdn.com/flex017/user_avatar/in-thread.sonic-pi.net/tsumutsura/32/3107_2.png) [@Tsumutsura](https://in-thread.sonic-pi.net/u/Tsumutsura)\ **Post date:** [August 2, 2026, 9:27am UTC](https://in-thread.sonic-pi.net/t/boot-issue-in-mac-os/9853/5 "2026-08-02T09:27:12Z")
Hello ! Sonic Pi 4.6.0 Won’t Start on macOS Intel: Ruby / GMP Fix, thank you chatgtp This guide is for Intel-based Macs running macOS Sonoma or another recent macOS version with Sonic Pi 4.6.0 x64. ## Symptoms When launching Sonic Pi, you may see: ```ruby Apologies, unable to start... GUI was unable to connect to the Ruby server. ``` The `gui.log` file may also contain messages such as: ```ruby Error reading ports via Boot Daemon STDOUT GUI - API Boot failed Critical Error. Unable to connect to server. ``` In this case, the real cause was a missing GMP library required by Sonic Pi’s bundled Ruby runtime: ```ruby Library not loaded: /usr/local/opt/gmp/lib/libgmp.10.dylib ``` ## 1. Make sure you installed the correct version For an Intel Mac, download: ```ruby Sonic-Pi-for-Mac-x64-v4-6-0.dmg ``` Do not install the ARM64 or Apple Silicon version, which is intended for M1, M2, M3, M4 and newer Apple chips. Install Sonic Pi in: ```ruby /Applications/Sonic Pi.app ``` ## 2. Quit Sonic Pi completely Close Sonic Pi before running the following commands. ## 3. Remove Sonic Pi’s local configuration and logs Open Terminal and run: ```ruby rm -rf ~/.sonic-pi ``` This removes Sonic Pi’s local configuration and log files. Note: this may also reset some Sonic Pi preferences. ## 4. Remove the macOS quarantine attribute Run: ```ruby xattr -dr com.apple.quarantine "/Applications/Sonic Pi.app" ``` This prevents macOS from blocking some of the executables bundled inside the application. ## 5. Start the Ruby daemon manually This command reveals the actual error hidden behind Sonic Pi’s generic startup message: ```ruby "/Applications/Sonic Pi.app/Contents/Resources/app/server/native/ruby/bin/ruby" \ "/Applications/Sonic Pi.app/Contents/Resources/app/server/ruby/bin/daemon.rb" \ --no-scsynth-inputs ``` In this case, Terminal displayed: ```ruby dyld: Library not loaded: /usr/local/opt/gmp/lib/libgmp.10.dylib Reason: no such file ``` This means the GMP library is missing. ## 6. Check whether Homebrew is installed Run: ```ruby brew --version ``` If Terminal displays: ```ruby command not found: brew ``` install Homebrew with: ```ruby /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" ``` On Intel Macs, Homebrew normally installs packages under: ```ruby /usr/local ``` ## 7. Install GMP Run: ```ruby brew install gmp ``` If GMP is already installed but Sonic Pi still fails, run: ```ruby brew reinstall gmp brew link gmp ``` ## 8. Verify that the required library exists Run: ```ruby ls -l /usr/local/opt/gmp/lib/libgmp.10.dylib ``` The command should display the file or a valid symbolic link. ## 9. Test the Ruby daemon again Run the manual startup command again: ```ruby "/Applications/Sonic Pi.app/Contents/Resources/app/server/native/ruby/bin/ruby" \ "/Applications/Sonic Pi.app/Contents/Resources/app/server/ruby/bin/daemon.rb" \ --no-scsynth-inputs ``` If the `libgmp.10.dylib` error is gone, stop the process with: ```ruby Ctrl + C ``` ## 10. Launch Sonic Pi normally Open Sonic Pi again from the Applications folder. After installing GMP, Sonic Pi 4.6.0 should be able to start normally. ## Command summary ```ruby rm -rf ~/.sonic-pi xattr -dr com.apple.quarantine "/Applications/Sonic Pi.app" brew install gmp ls -l /usr/local/opt/gmp/lib/libgmp.10.dylib ``` Manual diagnostic command: ```ruby "/Applications/Sonic Pi.app/Contents/Resources/app/server/native/ruby/bin/ruby" \ "/Applications/Sonic Pi.app/Contents/Resources/app/server/ruby/bin/daemon.rb" \ --no-scsynth-inputs ``` ## Tested configuration ```ruby Sonic Pi: 4.6.0 macOS: Sonoma 14.8 Architecture: x86_64 CPU: Intel Startup error: GUI unable to connect to Ruby server Root cause: missing libgmp.10.dylib Fix: install GMP using Homebrew ``` This fix applies specifically when the manual Ruby daemon command reports: ```ruby /usr/local/opt/gmp/lib/libgmp.10.dylib ``` If the daemon reports a different missing library or another error, the required fix may be different.