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--- tech:unix:imac-fan [2025/07/19 14:07] – ayush.zutshi
+++ tech:unix:imac-fan [2025/07/19 20:08] (current) – ayush.zutshi
@@ Line 1: / Line 1: @@
-====== Fan Cntrol for an IMac on Linux ======
+====== Fan Cntrol for an iMac on Linux ======
 I replaced an HDD with and SSD in an old 2009 iMac, disabled the CDROM.  Since the SSD does not have a temperature sensor and runs cold, the iMac fan runs at full tilt.
-Manually set the "odd" and "hdd" fans to minimum with:
+Manually set the "cpu", "hdd" and "odd" (The CDROM) fans to minimum with:
 <code>
-fan.sh odd 0
+apt install lm-sensors
-fan.sh hdd 0
+./fan.sh odd 0
+./fan.sh hdd 0  # if using an SSD
+./fan.sh cpu 50 # for the iMac8,1
 </code>
@@ Line 28: / Line 30: @@
     read -r label[$fan] < "${label_file[$fan]}"
     label[$fan]=${label[$fan],,}                  # lowercase
-    echo label[$fan] "auto="$(cat $sysdir/fan${fan}_manual) "rpm="$($sysdir/fan${fan}_output)
+    echo $(cat $sysdir/fan${fan}_label) "auto="$(cat $sysdir/fan${fan}_manual) "rpm="$(cat $sysdir/fan${fan}_output)
 }