diff --git a/Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/ubi/FatHeader.java b/Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/ubi/FatHeader.java
index e2edf0bc87..14b4de0bb7 100644
--- a/Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/ubi/FatHeader.java
+++ b/Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/ubi/FatHeader.java
@@ -23,8 +23,12 @@ import generic.continues.GenericFactory;
 import ghidra.app.util.bin.ByteProvider;
 import ghidra.app.util.bin.ByteProviderWrapper;
 import ghidra.app.util.bin.format.FactoryBundledWithBinaryReader;
+import ghidra.app.util.bin.format.coff.CoffException;
+import ghidra.app.util.bin.format.coff.archive.CoffArchiveHeader;
+import ghidra.app.util.bin.format.coff.archive.CoffArchiveMemberHeader;
 import ghidra.app.util.bin.format.macho.MachException;
 import ghidra.app.util.bin.format.macho.MachHeader;
+import ghidra.util.task.TaskMonitor;
 
 /**
  * Represents a fat_header structure.
@@ -71,9 +75,32 @@ public class FatHeader {
 		}
 
 		for (FatArch fatarch : architectures) {
-			ByteProviderWrapper wrapper = new ByteProviderWrapper(provider, fatarch.getOffset(), fatarch.getSize());
-			MachHeader machHeader = MachHeader.createMachHeader(factory, wrapper);
-			machHeaders.add(machHeader);
+			ByteProviderWrapper wrapper =
+				new ByteProviderWrapper(provider, fatarch.getOffset(), fatarch.getSize());
+
+			// It could be a Mach-O or a COFF archive
+			CoffArchiveHeader caf = null;
+			try {
+				caf = CoffArchiveHeader.read(wrapper, TaskMonitor.DUMMY);
+			}
+			catch (CoffException e) {
+				throw new UbiException(e);
+			}
+			if (caf != null) {
+				for (CoffArchiveMemberHeader camh : caf.getArchiveMemberHeaders()) {
+					wrapper = new ByteProviderWrapper(provider,
+						fatarch.getOffset() + camh.getPayloadOffset(), camh.getSize());
+					try {
+						machHeaders.add(MachHeader.createMachHeader(factory, wrapper));
+					}
+					catch (MachException e) {
+						// Could be __.SYMDEF archive member instead of a Mach-O
+					}
+				}
+			}
+			else {
+				machHeaders.add(MachHeader.createMachHeader(factory, wrapper));
+			}
 		}
 	}
 
diff --git a/Ghidra/Features/Base/src/main/java/ghidra/app/util/opinion/MachoProgramBuilder.java b/Ghidra/Features/Base/src/main/java/ghidra/app/util/opinion/MachoProgramBuilder.java
index e77ad1cf8d..8bd52e562d 100644
--- a/Ghidra/Features/Base/src/main/java/ghidra/app/util/opinion/MachoProgramBuilder.java
+++ b/Ghidra/Features/Base/src/main/java/ghidra/app/util/opinion/MachoProgramBuilder.java
@@ -16,8 +16,7 @@
 package ghidra.app.util.opinion;
 
 import java.math.BigInteger;
-import java.util.ArrayList;
-import java.util.List;
+import java.util.*;
 
 import ghidra.app.util.MemoryBlockUtils;
 import ghidra.app.util.bin.ByteProvider;
@@ -215,26 +214,32 @@ public class MachoProgramBuilder {
 		}
 
 		// Create memory blocks for segments.
-		for (SegmentCommand segment : header.getAllSegments()) {
+		ListIterator<SegmentCommand> it = header.getAllSegments().listIterator();
+		while (it.hasNext()) {
+			int i = it.nextIndex();
+			final SegmentCommand segment = it.next();
+
 			if (monitor.isCancelled()) {
 				break;
 			}
 
 			if (segment.getFileSize() > 0 && (allowZeroAddr || segment.getVMaddress() != 0)) {
-				if (createMemoryBlock(segment.getSegmentName(),
-					space.getAddress(segment.getVMaddress()), segment.getFileOffset(),
-					segment.getFileSize(), segment.getSegmentName(), source, segment.isRead(),
-					segment.isWrite(), segment.isExecute(), false) == null) {
+				String segmentName = segment.getSegmentName();
+				if (segmentName.isBlank()) {
+					segmentName = "SEGMENT." + i;
+				}
+				if (createMemoryBlock(segmentName, space.getAddress(segment.getVMaddress()),
+					segment.getFileOffset(), segment.getFileSize(), segmentName, source,
+					segment.isRead(), segment.isWrite(), segment.isExecute(), false) == null) {
 					log.appendMsg(String.format("Failed to create block: %s 0x%x 0x%x",
 						segment.getSegmentName(), segment.getVMaddress(), segment.getVMsize()));
 				}
 				if (segment.getVMsize() > segment.getFileSize()) {
 					// Pad the remaining address range with uninitialized data
-					if (createMemoryBlock(segment.getSegmentName(),
+					if (createMemoryBlock(segmentName,
 						space.getAddress(segment.getVMaddress()).add(segment.getFileSize()), 0,
-						segment.getVMsize() - segment.getFileSize(), segment.getSegmentName(),
-						source, segment.isRead(), segment.isWrite(), segment.isExecute(),
-						true) == null) {
+						segment.getVMsize() - segment.getFileSize(), segmentName, source,
+						segment.isRead(), segment.isWrite(), segment.isExecute(), true) == null) {
 						log.appendMsg(String.format("Failed to create block: %s 0x%x 0x%x",
 							segment.getSegmentName(), segment.getVMaddress(), segment.getVMsize()));
 					}
@@ -1343,7 +1348,7 @@ public class MachoProgramBuilder {
 				NList nList = machoHeader.getFirstLoadCommand(SymbolTableCommand.class).getSymbolAt(
 					symbolIndex);
 				Symbol symbol = SymbolUtilities.getLabelOrFunctionSymbol(program, nList.getString(),
-					err -> log.error("Macho", err));
+					err -> log.appendMsg("Macho", err));
 				if (relocation.isPcRelocated()) {
 
 					destinationAddress = symbol.getAddress().subtractWrap(