diff --git a/connectivity/source/drivers/macab/MacabRecords.cxx b/connectivity/source/drivers/macab/MacabRecords.cxx
index 17ee6585d45c..07d462425e65 100644
--- a/connectivity/source/drivers/macab/MacabRecords.cxx
+++ b/connectivity/source/drivers/macab/MacabRecords.cxx
@@ -344,7 +344,7 @@ MacabHeader *MacabRecords::createHeaderForRecordType(const CFArrayRef _records,
     /* While searching through the properties for required properties, these
      * sal_Bools will keep track of what we have found.
      */
-    bool bFoundRequiredProperties[requiredProperties.size()];
+    auto const bFoundRequiredProperties = std::make_unique<bool[]>(requiredProperties.size());
 
 
     /* We have three MacabHeaders: headerDataForProperty is where we
diff --git a/connectivity/source/drivers/macab/macabutilities.hxx b/connectivity/source/drivers/macab/macabutilities.hxx
index cfe46f37f286..7e0f6b091085 100644
--- a/connectivity/source/drivers/macab/macabutilities.hxx
+++ b/connectivity/source/drivers/macab/macabutilities.hxx
@@ -19,6 +19,10 @@
 
 #pragma once
 
+#include <sal/config.h>
+
+#include <memory>
+
 #include <com/sun/star/util/DateTime.hpp>
 #include <com/sun/star/sdbc/DataType.hpp>
 #include <unotools/resmgr.hxx>
@@ -47,15 +51,15 @@ namespace connectivity::macab
             CFRetain(sOrig);
             CFIndex nStringLength = CFStringGetLength(sOrig);
 
-            UniChar unichars[nStringLength+1];
+            auto const unichars = std::make_unique<UniChar[]>(nStringLength+1);
 
             //'close' the string buffer correctly
             unichars[nStringLength] = '\0';
 
-            CFStringGetCharacters (sOrig, CFRangeMake(0,nStringLength), unichars);
+            CFStringGetCharacters (sOrig, CFRangeMake(0,nStringLength), unichars.get());
             CFRelease(sOrig);
 
-            return OUString(reinterpret_cast<sal_Unicode *>(unichars));
+            return OUString(reinterpret_cast<sal_Unicode *>(unichars.get()));
         }
 
 
diff --git a/fpicker/source/aqua/NSString_OOoAdditions.mm b/fpicker/source/aqua/NSString_OOoAdditions.mm
index 23ae6bc5c853..5721674f8121 100644
--- a/fpicker/source/aqua/NSString_OOoAdditions.mm
+++ b/fpicker/source/aqua/NSString_OOoAdditions.mm
@@ -17,6 +17,10 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
+#include <sal/config.h>
+
+#include <memory>
+
 #include "NSString_OOoAdditions.hxx"
 
 @implementation NSString (OOoAdditions) 
@@ -32,14 +36,14 @@
 {
     unsigned int nFileNameLength = [self length];
 
-    UniChar unichars[nFileNameLength+1];
+    auto const unichars = std::make_unique<UniChar[]>(nFileNameLength+1);
 
     //'close' the string buffer correctly
     unichars[nFileNameLength] = '\0';
 
-    [self getCharacters:unichars];
+    [self getCharacters:unichars.get()];
 
-    return OUString(reinterpret_cast<sal_Unicode *>(unichars));
+    return OUString(reinterpret_cast<sal_Unicode *>(unichars.get()));
 }
 
 @end
diff --git a/shell/source/backends/macbe/macbackend.mm b/shell/source/backends/macbe/macbackend.mm
index e84ecd4b8013..7733bf95da6c 100644
--- a/shell/source/backends/macbe/macbackend.mm
+++ b/shell/source/backends/macbe/macbackend.mm
@@ -17,6 +17,9 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
+#include <sal/config.h>
+
+#include <memory>
 
 // For MAXHOSTNAMELEN constant
 #include <sys/param.h>
@@ -157,13 +160,13 @@ static OUString CFStringToOUString(const CFStringRef sOrig) {
     CFIndex nStringLen = CFStringGetLength(sOrig)+1;
 
     // Allocate a c string buffer
-    char sBuffer[nStringLen];
+    auto const sBuffer = std::make_unique<char[]>(nStringLen);
 
-    CFStringGetCString(sOrig, sBuffer, nStringLen, kCFStringEncodingASCII);
+    CFStringGetCString(sOrig, sBuffer.get(), nStringLen, kCFStringEncodingASCII);
 
     CFRelease(sOrig);
 
-    return OUString::createFromAscii(sBuffer);
+    return OUString::createFromAscii(sBuffer.get());
 }
 
 static OUString GetOUString( NSString* pStr )
diff --git a/vcl/osx/salframeview.mm b/vcl/osx/salframeview.mm
index f8608f62c2f7..4071155e28cc 100644
--- a/vcl/osx/salframeview.mm
+++ b/vcl/osx/salframeview.mm
@@ -19,6 +19,8 @@
 
 #include <sal/config.h>
 
+#include <memory>
+
 #include <sal/macros.h>
 #include <tools/helpers.hxx>
 #include <tools/long.hxx>
@@ -2048,7 +2050,7 @@ static NSArray *getMergedAccessibilityChildren(NSArray *pDefaultChildren, NSArra
         // Skip the posting of SalEvent::ExtTextInput and
         // SalEvent::EndExtTextInput events for private use area characters.
         NSUInteger nLen = [pChars length];
-        unichar pBuf[ nLen + 1 ];
+        auto const pBuf = std::make_unique<unichar[]>( nLen + 1 );
         NSUInteger nBufLen = 0;
         for ( NSUInteger i = 0; i < nLen; i++ )
         {
@@ -2060,7 +2062,7 @@ static NSArray *getMergedAccessibilityChildren(NSArray *pDefaultChildren, NSArra
         }
         pBuf[nBufLen] = 0;
 
-        pNewMarkedText = [NSString stringWithCharacters:pBuf length:nBufLen];
+        pNewMarkedText = [NSString stringWithCharacters:pBuf.get() length:nBufLen];
         if (!pNewMarkedText || ![pNewMarkedText length])
             bNeedsExtTextInput = false;
     }
diff --git a/vcl/quartz/salgdi.cxx b/vcl/quartz/salgdi.cxx
index f800e3c15829..0522ff8d58e7 100644
--- a/vcl/quartz/salgdi.cxx
+++ b/vcl/quartz/salgdi.cxx
@@ -18,6 +18,9 @@
  */
 
 #include <sal/config.h>
+
+#include <memory>
+
 #include <sal/log.hxx>
 #include <config_folders.h>
 
@@ -77,8 +80,8 @@ public:
 
 bool FontHasCharacter(CTFontRef pFont, const OUString& rString, sal_Int32 nIndex, sal_Int32 nLen)
 {
-    CGGlyph glyphs[nLen];
-    return CTFontGetGlyphsForCharacters(pFont, reinterpret_cast<const UniChar*>(rString.getStr() + nIndex), glyphs, nLen);
+    auto const glyphs = std::make_unique<CGGlyph[]>(nLen);
+    return CTFontGetGlyphsForCharacters(pFont, reinterpret_cast<const UniChar*>(rString.getStr() + nIndex), glyphs.get(), nLen);
 }
 
 }