diff --git a/code/platformio.ini b/code/platformio.ini
index 2a7f3fde..dc101e10 100644
--- a/code/platformio.ini
+++ b/code/platformio.ini
@@ -38,6 +38,10 @@ extra_configs =
 #
 # ------------------------------------------------------------------------------
 
+# TODO(espressif8266@2.6.2): https://github.com/xoseperez/espurna/wiki/PlatformIO#macos-big-sur
+# Current version needs `platformio/tool-esptoolpy @ ~1.30000.0`
+# (or, just avoiding `-t upload` and using esptool script manually)
+
 platform = espressif8266@2.6.2
 platform_latest = espressif8266@2.6.2