diff --git a/bin/optimize.sh b/bin/optimize.sh
index 67ac0eb..e9aa4a7 100755
--- a/bin/optimize.sh
+++ b/bin/optimize.sh
@@ -108,12 +108,12 @@ show_system_health() {
     local health_json="$1"
 
     # Parse system health using jq with fallback to 0
-    local mem_used=$(echo "$health_json" | jq -r '.memory_used_gb // 0' 2>/dev/null || echo "0")
-    local mem_total=$(echo "$health_json" | jq -r '.memory_total_gb // 0' 2>/dev/null || echo "0")
-    local disk_used=$(echo "$health_json" | jq -r '.disk_used_gb // 0' 2>/dev/null || echo "0")
-    local disk_total=$(echo "$health_json" | jq -r '.disk_total_gb // 0' 2>/dev/null || echo "0")
-    local disk_percent=$(echo "$health_json" | jq -r '.disk_used_percent // 0' 2>/dev/null || echo "0")
-    local uptime=$(echo "$health_json" | jq -r '.uptime_days // 0' 2>/dev/null || echo "0")
+    local mem_used=$(echo "$health_json" | jq -r '.memory_used_gb // 0' 2> /dev/null || echo "0")
+    local mem_total=$(echo "$health_json" | jq -r '.memory_total_gb // 0' 2> /dev/null || echo "0")
+    local disk_used=$(echo "$health_json" | jq -r '.disk_used_gb // 0' 2> /dev/null || echo "0")
+    local disk_total=$(echo "$health_json" | jq -r '.disk_total_gb // 0' 2> /dev/null || echo "0")
+    local disk_percent=$(echo "$health_json" | jq -r '.disk_used_percent // 0' 2> /dev/null || echo "0")
+    local uptime=$(echo "$health_json" | jq -r '.uptime_days // 0' 2> /dev/null || echo "0")
 
     # Ensure all values are numeric (fallback to 0)
     mem_used=${mem_used:-0}
@@ -381,7 +381,7 @@ main() {
     fi
 
     # Validate JSON before proceeding
-    if ! echo "$health_json" | jq empty 2>/dev/null; then
+    if ! echo "$health_json" | jq empty 2> /dev/null; then
         if [[ -t 1 ]]; then
             stop_inline_spinner
         fi
diff --git a/bin/uninstall.sh b/bin/uninstall.sh
index a77210a..ac7cecc 100755
--- a/bin/uninstall.sh
+++ b/bin/uninstall.sh
@@ -110,7 +110,7 @@ scan_applications() {
     # Check if cache exists and is fresh
     if [[ -f "$cache_file" ]]; then
         local cache_age=$(($(date +%s) - $(get_file_mtime "$cache_file")))
-        [[ $cache_age -eq $(date +%s) ]] && cache_age=86401  # Handle missing file
+        [[ $cache_age -eq $(date +%s) ]] && cache_age=86401 # Handle missing file
         if [[ $cache_age -lt $cache_ttl ]]; then
             # Cache hit - return immediately
             echo "$cache_file"
@@ -633,7 +633,7 @@ main() {
     local cache_file="$HOME/.cache/mole/app_scan_cache"
     if [[ -f "$cache_file" ]]; then
         local cache_age=$(($(date +%s) - $(get_file_mtime "$cache_file")))
-        [[ $cache_age -eq $(date +%s) ]] && cache_age=86401  # Handle missing file
+        [[ $cache_age -eq $(date +%s) ]] && cache_age=86401 # Handle missing file
         [[ $cache_age -lt 86400 ]] && needs_scanning=false
     fi
 
diff --git a/lib/common.sh b/lib/common.sh
index 47fe4e9..fd11fd3 100755
--- a/lib/common.sh
+++ b/lib/common.sh
@@ -48,17 +48,17 @@ readonly STAT_BSD="/usr/bin/stat"
 
 get_file_size() {
     local file="$1"
-    $STAT_BSD -f%z "$file" 2>/dev/null || echo 0
+    $STAT_BSD -f%z "$file" 2> /dev/null || echo 0
 }
 
 get_file_mtime() {
     local file="$1"
-    $STAT_BSD -f%m "$file" 2>/dev/null || echo 0
+    $STAT_BSD -f%m "$file" 2> /dev/null || echo 0
 }
 
 get_file_owner() {
     local file="$1"
-    $STAT_BSD -f%Su "$file" 2>/dev/null || echo ""
+    $STAT_BSD -f%Su "$file" 2> /dev/null || echo ""
 }
 
 # Security and Path Validation Functions
@@ -672,9 +672,9 @@ update_via_homebrew() {
     local brew_tmp_file=""
     local brew_exit_file=""
     cleanup_brew_update() {
-        if [[ -n "$brew_pid" ]] && kill -0 "$brew_pid" 2>/dev/null; then
-            kill -TERM "$brew_pid" 2>/dev/null || true
-            wait "$brew_pid" 2>/dev/null || true
+        if [[ -n "$brew_pid" ]] && kill -0 "$brew_pid" 2> /dev/null; then
+            kill -TERM "$brew_pid" 2> /dev/null || true
+            wait "$brew_pid" 2> /dev/null || true
         fi
         [[ -n "$brew_tmp_file" ]] && rm -f "$brew_tmp_file"
         [[ -n "$brew_exit_file" ]] && rm -f "$brew_exit_file"
@@ -696,7 +696,10 @@ update_via_homebrew() {
     # Redirect brew output to temp file to avoid interfering with spinner
     # Store exit code in a separate file to avoid wait issues with zsh
     brew_exit_file="${brew_tmp_file}.exit"
-    (brew update > "$brew_tmp_file" 2>&1 </dev/null; echo $? > "$brew_exit_file") &
+    (
+        brew update > "$brew_tmp_file" 2>&1 < /dev/null
+        echo $? > "$brew_exit_file"
+    ) &
     brew_pid=$!
     local elapsed=0
 
@@ -723,7 +726,7 @@ update_via_homebrew() {
     # Get brew update exit code from file instead of wait
     local brew_exit=0
     if [[ -f "$brew_exit_file" ]]; then
-        brew_exit=$(cat "$brew_exit_file" 2>/dev/null || echo "0")
+        brew_exit=$(cat "$brew_exit_file" 2> /dev/null || echo "0")
     fi
     rm -f "$brew_exit_file"
 
@@ -736,7 +739,7 @@ update_via_homebrew() {
     local update_output=""
 
     if [[ -f "$brew_tmp_file" ]]; then
-        update_output=$(cat "$brew_tmp_file" 2>/dev/null)
+        update_output=$(cat "$brew_tmp_file" 2> /dev/null)
     fi
 
     # Check for errors in output (brew update may return 0 even on failure)
diff --git a/lib/optimization_tasks.sh b/lib/optimization_tasks.sh
index ccddeab..b5766e3 100644
--- a/lib/optimization_tasks.sh
+++ b/lib/optimization_tasks.sh
@@ -220,7 +220,7 @@ opt_mail_downloads() {
     local deleted=0
     for target_path in "${mail_dirs[@]}"; do
         if [[ -d "$target_path" ]]; then
-            deleted=$((deleted + $(find "$target_path" -type f -mtime +30 -delete -print 2>/dev/null | wc -l | tr -d ' ')))
+            deleted=$((deleted + $(find "$target_path" -type f -mtime +30 -delete -print 2> /dev/null | wc -l | tr -d ' ')))
         fi
     done
 
@@ -243,7 +243,7 @@ opt_saved_state_cleanup() {
 
     # Only delete states older than 7 days (safer - won't lose recent work)
     local deleted=0
-    deleted=$(find "$state_dir" -type d -name "*.savedState" -mtime +7 -exec rm -rf {} \; -print 2>/dev/null | wc -l | tr -d ' ')
+    deleted=$(find "$state_dir" -type d -name "*.savedState" -mtime +7 -exec rm -rf {} \; -print 2> /dev/null | wc -l | tr -d ' ')
 
     if [[ $deleted -gt 0 ]]; then
         echo -e "${GREEN}${ICON_SUCCESS}${NC} Removed $deleted old saved state(s)"
diff --git a/lib/optimize_health.sh b/lib/optimize_health.sh
index e0687a7..63c4e67 100755
--- a/lib/optimize_health.sh
+++ b/lib/optimize_health.sh
@@ -10,7 +10,7 @@ get_memory_info() {
 
     # Total memory
     total_bytes=$(sysctl -n hw.memsize 2> /dev/null || echo "0")
-    total_gb=$(awk "BEGIN {printf \"%.2f\", $total_bytes / (1024*1024*1024)}" 2>/dev/null || echo "0")
+    total_gb=$(awk "BEGIN {printf \"%.2f\", $total_bytes / (1024*1024*1024)}" 2> /dev/null || echo "0")
     [[ -z "$total_gb" || "$total_gb" == "" ]] && total_gb="0"
 
     # Used memory from vm_stat
@@ -18,16 +18,16 @@ get_memory_info() {
     vm_output=$(vm_stat 2> /dev/null || echo "")
     page_size=4096
 
-    active=$(echo "$vm_output" | awk '/Pages active:/ {print $NF}' | tr -d '.' 2>/dev/null || echo "0")
-    wired=$(echo "$vm_output" | awk '/Pages wired down:/ {print $NF}' | tr -d '.' 2>/dev/null || echo "0")
-    compressed=$(echo "$vm_output" | awk '/Pages occupied by compressor:/ {print $NF}' | tr -d '.' 2>/dev/null || echo "0")
+    active=$(echo "$vm_output" | awk '/Pages active:/ {print $NF}' | tr -d '.' 2> /dev/null || echo "0")
+    wired=$(echo "$vm_output" | awk '/Pages wired down:/ {print $NF}' | tr -d '.' 2> /dev/null || echo "0")
+    compressed=$(echo "$vm_output" | awk '/Pages occupied by compressor:/ {print $NF}' | tr -d '.' 2> /dev/null || echo "0")
 
     active=${active:-0}
     wired=${wired:-0}
     compressed=${compressed:-0}
 
     local used_bytes=$(((active + wired + compressed) * page_size))
-    used_gb=$(awk "BEGIN {printf \"%.2f\", $used_bytes / (1024*1024*1024)}" 2>/dev/null || echo "0")
+    used_gb=$(awk "BEGIN {printf \"%.2f\", $used_bytes / (1024*1024*1024)}" 2> /dev/null || echo "0")
     [[ -z "$used_gb" || "$used_gb" == "" ]] && used_gb="0"
 
     echo "$used_gb $total_gb"
@@ -41,16 +41,16 @@ get_disk_info() {
     df_output=$(df -k "$home" 2> /dev/null | tail -1)
 
     local total_kb used_kb
-    total_kb=$(echo "$df_output" | awk '{print $2}' 2>/dev/null || echo "0")
-    used_kb=$(echo "$df_output" | awk '{print $3}' 2>/dev/null || echo "0")
+    total_kb=$(echo "$df_output" | awk '{print $2}' 2> /dev/null || echo "0")
+    used_kb=$(echo "$df_output" | awk '{print $3}' 2> /dev/null || echo "0")
 
     total_kb=${total_kb:-0}
     used_kb=${used_kb:-0}
-    [[ "$total_kb" == "0" ]] && total_kb=1  # Avoid division by zero
+    [[ "$total_kb" == "0" ]] && total_kb=1 # Avoid division by zero
 
-    total_gb=$(awk "BEGIN {printf \"%.2f\", $total_kb / (1024*1024)}" 2>/dev/null || echo "0")
-    used_gb=$(awk "BEGIN {printf \"%.2f\", $used_kb / (1024*1024)}" 2>/dev/null || echo "0")
-    used_percent=$(awk "BEGIN {printf \"%.1f\", ($used_kb / $total_kb) * 100}" 2>/dev/null || echo "0")
+    total_gb=$(awk "BEGIN {printf \"%.2f\", $total_kb / (1024*1024)}" 2> /dev/null || echo "0")
+    used_gb=$(awk "BEGIN {printf \"%.2f\", $used_kb / (1024*1024)}" 2> /dev/null || echo "0")
+    used_percent=$(awk "BEGIN {printf \"%.1f\", ($used_kb / $total_kb) * 100}" 2> /dev/null || echo "0")
 
     [[ -z "$total_gb" || "$total_gb" == "" ]] && total_gb="0"
     [[ -z "$used_gb" || "$used_gb" == "" ]] && used_gb="0"
@@ -64,12 +64,12 @@ get_uptime_days() {
     local boot_output boot_time uptime_days
 
     boot_output=$(sysctl -n kern.boottime 2> /dev/null || echo "")
-    boot_time=$(echo "$boot_output" | sed -n 's/.*sec = \([0-9]*\).*/\1/p' 2>/dev/null || echo "")
+    boot_time=$(echo "$boot_output" | sed -n 's/.*sec = \([0-9]*\).*/\1/p' 2> /dev/null || echo "")
 
     if [[ -n "$boot_time" && "$boot_time" =~ ^[0-9]+$ ]]; then
-        local now=$(date +%s 2>/dev/null || echo "0")
+        local now=$(date +%s 2> /dev/null || echo "0")
         local uptime_sec=$((now - boot_time))
-        uptime_days=$(awk "BEGIN {printf \"%.1f\", $uptime_sec / 86400}" 2>/dev/null || echo "0")
+        uptime_days=$(awk "BEGIN {printf \"%.1f\", $uptime_sec / 86400}" 2> /dev/null || echo "0")
     else
         uptime_days="0"
     fi