diff --git a/diskimg/CPM.cpp b/diskimg/CPM.cpp
index 6108396..ea68b85 100644
--- a/diskimg/CPM.cpp
+++ b/diskimg/CPM.cpp
@@ -571,8 +571,8 @@ void A2FileCPM::Dump(void) const
  */
 DIError A2FDCPM::Read(void* buf, size_t len, size_t* pActual)
 {
-    LOGI(" CP/M reading %zd bytes from '%s' (offset=%ld)",
-        len, fpFile->GetPathName(), (long) fOffset);
+    LOGI(" CP/M reading %lu bytes from '%s' (offset=%ld)",
+        (unsigned long) len, fpFile->GetPathName(), (long) fOffset);
 
     A2FileCPM* pFile = (A2FileCPM*) fpFile;
 
diff --git a/diskimg/DDD.cpp b/diskimg/DDD.cpp
index 1062368..b0c7cb7 100644
--- a/diskimg/DDD.cpp
+++ b/diskimg/DDD.cpp
@@ -514,12 +514,13 @@ static const uint8_t kFavoriteBitDec[kNumFavorites] = {
     dierr = pGFD->Read(&sctBuf, sizeof(sctBuf), &actual);
     if (dierr == kDIErrNone) {
         if (actual > /*kMaxExcessByteCount*/ 256) {
-            LOGI(" DDD looks like too much data in input file (%zd extra)",
-                actual);
+            LOGW(" DDD looks like too much data in input file (%lu extra)",
+                (unsigned long) actual);
             dierr = kDIErrBadCompressedData;
             goto bail;
         } else {
-            LOGI(" DDD excess bytes (%zd) within normal parameters", actual);
+            LOGI(" DDD excess bytes (%lu) within normal parameters",
+                (unsigned long) actual);
         }
     }
 
diff --git a/diskimg/DOS33.cpp b/diskimg/DOS33.cpp
index 3788223..0b0fa8d 100644
--- a/diskimg/DOS33.cpp
+++ b/diskimg/DOS33.cpp
@@ -2884,8 +2884,8 @@ bail:
  */
 DIError A2FDDOS::Read(void* buf, size_t len, size_t* pActual)
 {
-    LOGI(" DOS reading %zd bytes from '%s' (offset=%ld)",
-        len, fpFile->GetPathName(), (long) fOffset);
+    LOGD(" DOS reading %lu bytes from '%s' (offset=%ld)",
+        (unsigned long) len, fpFile->GetPathName(), (long) fOffset);
 
     A2FileDOS* pFile = (A2FileDOS*) fpFile;
 
@@ -2976,7 +2976,7 @@ DIError A2FDDOS::Write(const void* buf, size_t len, size_t* pActual)
     DiskFSDOS33* pDiskFS = (DiskFSDOS33*) fpFile->GetDiskFS();
     uint8_t sctBuf[kSctSize];
 
-    LOGI("   DOS Write len=%zd %s", len, pFile->GetPathName());
+    LOGD("   DOS Write len=%lu %s", (unsigned long) len, pFile->GetPathName());
 
     if (len >= 0x01000000) {    // 16MB
         assert(false);
diff --git a/diskimg/FAT.cpp b/diskimg/FAT.cpp
index ff94404..7b7e27c 100644
--- a/diskimg/FAT.cpp
+++ b/diskimg/FAT.cpp
@@ -394,8 +394,8 @@ DIError A2FileFAT::Open(A2FileDescr** ppOpenFile, bool readOnly,
  */
 DIError A2FDFAT::Read(void* buf, size_t len, size_t* pActual)
 {
-    LOGD(" FAT reading %zd bytes from '%s' (offset=%ld)",
-        len, fpFile->GetPathName(), (long) fOffset);
+    LOGD(" FAT reading %lu bytes from '%s' (offset=%ld)",
+        (unsigned long) len, fpFile->GetPathName(), (long) fOffset);
 
     A2FileFAT* pFile = (A2FileFAT*) fpFile;
 
diff --git a/diskimg/GenericFD.cpp b/diskimg/GenericFD.cpp
index a28ac2d..b751cfb 100644
--- a/diskimg/GenericFD.cpp
+++ b/diskimg/GenericFD.cpp
@@ -142,8 +142,8 @@ DIError GFDFile::Read(void* buf, size_t length, size_t* pActual)
     if (pActual == NULL) {
         if (actual != length) {
             dierr = ErrnoOrGeneric();
-            LOGI("  GDFile Read failed on %zd bytes (actual=%zd, err=%d)",
-                length, actual, dierr);
+            LOGW("  GDFile Read failed on %lu bytes (actual=%lu, err=%d)",
+                (unsigned long) length, (unsigned long) actual, dierr);
             return dierr;
         }
     } else {
@@ -163,7 +163,8 @@ DIError GFDFile::Write(const void* buf, size_t length, size_t* pActual)
     assert(pActual == NULL);     // not handling this yet
     if (::fwrite(buf, length, 1, fFp) != 1) {
         dierr = ErrnoOrGeneric();
-        LOGI("  GDFile Write failed on %zd bytes (err=%d)", length, dierr);
+        LOGW("  GDFile Write failed on %lu bytes (err=%d)",
+            (unsigned long) length, dierr);
         return dierr;
     }
     return dierr;
@@ -440,8 +441,8 @@ DIError GFDBuffer::Read(void* buf, size_t length, size_t* pActual)
 
     if (fCurrentOffset + (long)length > fLength) {
         if (pActual == NULL) {
-            LOGI("  GFDBuffer underrrun off=%ld len=%zd flen=%ld",
-                (long) fCurrentOffset, length, (long) fLength);
+            LOGW("  GFDBuffer underrrun off=%ld len=%lu flen=%ld",
+                (long) fCurrentOffset, (unsigned long) length, (long) fLength);
             return kDIErrDataUnderrun;
         } else {
             /* set *pActual and adjust "length" */
@@ -469,8 +470,8 @@ DIError GFDBuffer::Write(const void* buf, size_t length, size_t* pActual)
     assert(pActual == NULL);     // not handling this yet
     if (fCurrentOffset + (long)length > fLength) {
         if (!fDoExpand) {
-            LOGI("  GFDBuffer overrun off=%ld len=%zd flen=%ld",
-                (long) fCurrentOffset, length, (long) fLength);
+            LOGI("  GFDBuffer overrun off=%ld len=%lu flen=%ld",
+                (long) fCurrentOffset, (unsigned long) length, (long) fLength);
             return kDIErrDataOverrun;
         }
 
diff --git a/diskimg/Gutenberg.cpp b/diskimg/Gutenberg.cpp
index 6e26c3f..dfccdb5 100644
--- a/diskimg/Gutenberg.cpp
+++ b/diskimg/Gutenberg.cpp
@@ -523,8 +523,8 @@ void A2FileGutenberg::Dump(void) const
  */
 DIError A2FDGutenberg::Read(void* buf, size_t len, size_t* pActual)
 {
-    LOGI(" Gutenberg reading %zd bytes from '%s' (offset=%ld)",
-        len, fpFile->GetPathName(), (long) fOffset);
+    LOGD(" Gutenberg reading %lu bytes from '%s' (offset=%ld)",
+        (unsigned long) len, fpFile->GetPathName(), (long) fOffset);
 
     A2FileGutenberg* pFile = (A2FileGutenberg*) fpFile;
 
diff --git a/diskimg/HFS.cpp b/diskimg/HFS.cpp
index 00b3341..664ed6e 100644
--- a/diskimg/HFS.cpp
+++ b/diskimg/HFS.cpp
@@ -1855,8 +1855,9 @@ DIError A2FDHFS::Read(void* buf, size_t len, size_t* pActual)
 {
     long result;
 
-    LOGI(" HFS reading %zd bytes from '%s' (offset=%ld)",
-        len, fpFile->GetPathName(), hfs_seek(fHfsFile, 0, HFS_SEEK_CUR));
+    LOGD(" HFS reading %lu bytes from '%s' (offset=%ld)",
+        (unsigned long) len, fpFile->GetPathName(),
+        hfs_seek(fHfsFile, 0, HFS_SEEK_CUR));
 
     //A2FileHFS* pFile = (A2FileHFS*) fpFile;
 
@@ -1896,8 +1897,9 @@ DIError A2FDHFS::Write(const void* buf, size_t len, size_t* pActual)
 {
     long result;
 
-    LOGI(" HFS writing %zd bytes to '%s' (offset=%ld)",
-        len, fpFile->GetPathName(), hfs_seek(fHfsFile, 0, HFS_SEEK_CUR));
+    LOGD(" HFS writing %lu bytes to '%s' (offset=%ld)",
+        (unsigned long) len, fpFile->GetPathName(),
+        hfs_seek(fHfsFile, 0, HFS_SEEK_CUR));
 
     fModified = true;       // assume something gets changed
 
diff --git a/diskimg/OuterWrapper.cpp b/diskimg/OuterWrapper.cpp
index 65bfa51..ce6f3e5 100644
--- a/diskimg/OuterWrapper.cpp
+++ b/diskimg/OuterWrapper.cpp
@@ -328,7 +328,7 @@ DIError OuterGzip::Save(GenericFD* pOuterGFD, GenericFD* pWrapperGFD,
 
         written = gzwrite(gzfp, buf, actual);
         if (written == 0) {
-            LOGI("Failed writing %zd bytes to gzio", actual);
+            LOGE("Failed writing %lu bytes to gzio", (unsigned long) actual);
             dierr = kDIErrGeneric;
             goto bail;
         }
@@ -338,7 +338,7 @@ DIError OuterGzip::Save(GenericFD* pOuterGFD, GenericFD* pWrapperGFD,
     }
     assert(wrapperLength == 0);     // not expecting any slop
 
-    LOGI(" GZ wrote %ld bytes", totalWritten);
+    LOGD(" GZ wrote %ld bytes", totalWritten);
 
     /*
      * Success!
diff --git a/diskimg/Pascal.cpp b/diskimg/Pascal.cpp
index 0e6a47e..6eff01a 100644
--- a/diskimg/Pascal.cpp
+++ b/diskimg/Pascal.cpp
@@ -1579,8 +1579,8 @@ DIError A2FilePascal::Open(A2FileDescr** ppOpenFile, bool readOnly,
  */
 DIError A2FDPascal::Read(void* buf, size_t len, size_t* pActual)
 {
-    LOGI(" Pascal reading %zd bytes from '%s' (offset=%ld)",
-        len, fpFile->GetPathName(), (long) fOffset);
+    LOGD(" Pascal reading %lu bytes from '%s' (offset=%ld)",
+        (unsigned long) len, fpFile->GetPathName(), (long) fOffset);
 
     A2FilePascal* pFile = (A2FilePascal*) fpFile;
 
@@ -1644,7 +1644,7 @@ DIError A2FDPascal::Write(const void* buf, size_t len, size_t* pActual)
     uint8_t blkBuf[kBlkSize];
     size_t origLen = len;
 
-    LOGI("   DOS Write len=%zd %s", len, pFile->GetPathName());
+    LOGD("   DOS Write len=%lu %s", (unsigned long) len, pFile->GetPathName());
 
     if (len >= 0x01000000) {    // 16MB
         assert(false);
@@ -1669,8 +1669,8 @@ DIError A2FDPascal::Write(const void* buf, size_t len, size_t* pActual)
         blocksAvail = pNextFile->fStartBlock - pFile->fStartBlock;
 
     blocksNeeded = (len + kBlkSize -1) / kBlkSize;
-    LOGI("Pascal write '%s' %zd bytes: avail=%ld needed=%ld",
-        pFile->GetPathName(), len, blocksAvail, blocksNeeded);
+    LOGD("Pascal write '%s' %lu bytes: avail=%ld needed=%ld",
+        pFile->GetPathName(), (unsigned long) len, blocksAvail, blocksNeeded);
     if (blocksAvail < blocksNeeded)
         return kDIErrDiskFull;
 
diff --git a/diskimg/ProDOS.cpp b/diskimg/ProDOS.cpp
index 8579af4..34cc352 100644
--- a/diskimg/ProDOS.cpp
+++ b/diskimg/ProDOS.cpp
@@ -3652,8 +3652,8 @@ DIError DiskFSProDOS::SetFileInfo(A2File* pGenericFile, long fileType,
         goto bail;
     }
     if ((size_t) (*ptr & 0x0f) != strlen(pFile->fDirEntry.fileName)) {
-        LOGI("ProDOS GLITCH: wrong file?  (len=%d vs %zd)",
-            *ptr & 0x0f, strlen(pFile->fDirEntry.fileName));
+        LOGW("ProDOS GLITCH: wrong file?  (len=%d vs %u)",
+            *ptr & 0x0f, (unsigned int) strlen(pFile->fDirEntry.fileName));
         assert(false);
         dierr = kDIErrBadDirectory;
         goto bail;
@@ -4392,8 +4392,8 @@ void A2FileProDOS::Dump(void) const
  */
 DIError A2FDProDOS::Read(void* buf, size_t len, size_t* pActual)
 {
-    LOGI(" ProDOS reading %zd bytes from '%s' (offset=%ld)",
-        len, fpFile->GetPathName(), (long) fOffset);
+    LOGD(" ProDOS reading %lu bytes from '%s' (offset=%ld)",
+        (unsigned long) len, fpFile->GetPathName(), (long) fOffset);
     //if (fBlockList == NULL)
     //  return kDIErrNotReady;
 
@@ -4772,8 +4772,8 @@ DIError A2FDProDOS::WriteDirectory(const void* buf, size_t len, size_t* pActual)
 {
     DIError dierr = kDIErrNone;
 
-    LOGI("ProDOS  writing %zd bytes to directory '%s'",
-        len, fpFile->GetPathName());
+    LOGD("ProDOS  writing %lu bytes to directory '%s'",
+        (unsigned long) len, fpFile->GetPathName());
 
     assert(len >= (size_t)kBlkSize);
     assert((len % kBlkSize) == 0);
diff --git a/diskimg/RDOS.cpp b/diskimg/RDOS.cpp
index 956f266..c28a4af 100644
--- a/diskimg/RDOS.cpp
+++ b/diskimg/RDOS.cpp
@@ -533,8 +533,8 @@ DIError A2FileRDOS::Open(A2FileDescr** ppOpenFile, bool readOnly,
  */
 DIError A2FDRDOS::Read(void* buf, size_t len, size_t* pActual)
 {
-    LOGI(" RDOS reading %zd bytes from '%s' (offset=%ld)",
-        len, fpFile->GetPathName(), (long) fOffset);
+    LOGD(" RDOS reading %lu bytes from '%s' (offset=%ld)",
+        (unsigned long) len, fpFile->GetPathName(), (long) fOffset);
     //if (!fOpen)
     //  return kDIErrNotReady;