diff --git a/alt-tab-macos/logic/Spaces.swift b/alt-tab-macos/logic/Spaces.swift
index 2f472ce9..e502819b 100644
--- a/alt-tab-macos/logic/Spaces.swift
+++ b/alt-tab-macos/logic/Spaces.swift
@@ -26,7 +26,7 @@ class Spaces {
     static func updateCurrentSpace() {
         currentSpaceId = CGSManagedDisplayGetCurrentSpace(cgsMainConnectionId, Screen.mainUuid())
         currentSpaceIndex = allIdsAndIndexes().first { $0.0 == currentSpaceId }!.1
-        debugPrint("current space", currentSpaceId)
+        debugPrint("Current space", currentSpaceId)
     }
 
     static func allIdsAndIndexes() -> [(CGSSpaceID, SpaceIndex)] {
diff --git a/alt-tab-macos/ui/Cell.swift b/alt-tab-macos/ui/Cell.swift
index bc17da2d..b622af07 100644
--- a/alt-tab-macos/ui/Cell.swift
+++ b/alt-tab-macos/ui/Cell.swift
@@ -42,7 +42,8 @@ class Cell: NSCollectionViewItem {
     func updateRecycledCellWithNewContent(_ element: Window, _ mouseDownCallback: @escaping MouseDownCallback, _ mouseMovedCallback: @escaping MouseMovedCallback, _ screen: NSScreen) {
         window = element
         thumbnail.image = element.thumbnail
-        let thumbnailSize = Cell.thumbnailSize(element.thumbnail, screen)
+        let (thumbnailWidth, thumbnailHeight) = Cell.thumbnailSize(element.thumbnail, screen)
+        let thumbnailSize = NSSize(width: thumbnailWidth.rounded(), height: thumbnailHeight.rounded())
         thumbnail.image?.size = thumbnailSize
         thumbnail.frame.size = thumbnailSize
         appIcon.image = element.icon
@@ -110,27 +111,22 @@ class Cell: NSCollectionViewItem {
     }
 
     static func widthMax(_ screen: NSScreen) -> CGFloat {
-        return floor((ThumbnailsPanel.widthMax(screen) / Preferences.minCellsPerRow - Preferences.interCellPadding) * Cell.downscaleFactor())
+        return (ThumbnailsPanel.widthMax(screen) / Preferences.minCellsPerRow - Preferences.interCellPadding) * Cell.downscaleFactor()
     }
 
     static func widthMin(_ screen: NSScreen) -> CGFloat {
-        return floor((ThumbnailsPanel.widthMax(screen) / Preferences.maxCellsPerRow - Preferences.interCellPadding) * Cell.downscaleFactor())
+        return (ThumbnailsPanel.widthMax(screen) / Preferences.maxCellsPerRow - Preferences.interCellPadding) * Cell.downscaleFactor()
     }
 
     static func height(_ screen: NSScreen) -> CGFloat {
-        return floor((ThumbnailsPanel.heightMax(screen) / Preferences.nCellsRows - Preferences.interCellPadding) * Cell.downscaleFactor())
+        return (ThumbnailsPanel.heightMax(screen) / Preferences.nCellsRows - Preferences.interCellPadding) * Cell.downscaleFactor()
     }
 
     static func width(_ image: NSImage?, _ screen: NSScreen) -> CGFloat {
-        return floor(max(thumbnailSize(image, screen).width + Preferences.intraCellPadding * 2, Cell.widthMin(screen)))
+        return max(thumbnailSize(image, screen).0 + Preferences.intraCellPadding * 2, Cell.widthMin(screen))
     }
 
-    static func thumbnailSize(_ image: NSImage?, _ screen: NSScreen) -> NSSize {
-        let (width, height) = thumbnailSize_(image, screen)
-        return NSSize(width: floor(width), height: floor(height))
-    }
-
-    static func thumbnailSize_(_ image: NSImage?, _ screen: NSScreen) -> (CGFloat, CGFloat) {
+    static func thumbnailSize(_ image: NSImage?, _ screen: NSScreen) -> (CGFloat, CGFloat) {
         let thumbnailWidthMin = Cell.widthMin(screen) - Preferences.intraCellPadding * 2
         let thumbnailHeightMax = Cell.height(screen) - Preferences.intraCellPadding * 3 - Preferences.iconSize
         let thumbnailWidthMax = Cell.widthMax(screen) - Preferences.intraCellPadding * 2
diff --git a/alt-tab-macos/ui/CollectionViewCenterFlowLayout.swift b/alt-tab-macos/ui/CollectionViewCenterFlowLayout.swift
index 7adc6a32..1e09dfa7 100644
--- a/alt-tab-macos/ui/CollectionViewCenterFlowLayout.swift
+++ b/alt-tab-macos/ui/CollectionViewCenterFlowLayout.swift
@@ -45,7 +45,7 @@ class CollectionViewCenterFlowLayout: NSCollectionViewFlowLayout {
     }
 
     private func shiftCenteredElementToTheLeft(_ attributes: [NSCollectionViewLayoutAttributes], _ widestRow: CGFloat, _ totalHeight: CGFloat) {
-        let horizontalMargin = floor((collectionView!.frame.size.width - widestRow) / 2)
+        let horizontalMargin = ((collectionView!.frame.size.width - widestRow) / 2).rounded()
         for attribute in attributes {
             attribute.frame.origin.x -= horizontalMargin
         }
diff --git a/alt-tab-macos/ui/ThumbnailsPanel.swift b/alt-tab-macos/ui/ThumbnailsPanel.swift
index 47fa1dec..67028899 100644
--- a/alt-tab-macos/ui/ThumbnailsPanel.swift
+++ b/alt-tab-macos/ui/ThumbnailsPanel.swift
@@ -75,7 +75,7 @@ class ThumbnailsPanel: NSPanel, NSCollectionViewDataSource, NSCollectionViewDele
 
     func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> NSSize {
         guard indexPath.item < Windows.list.count else { return .zero }
-        return NSSize(width: Cell.width(Windows.list[indexPath.item].thumbnail, currentScreen!), height: Cell.height(currentScreen!))
+        return NSSize(width: Cell.width(Windows.list[indexPath.item].thumbnail, currentScreen!).rounded(), height: Cell.height(currentScreen!).rounded())
     }
 
     func highlightCell() {
@@ -97,7 +97,7 @@ class ThumbnailsPanel: NSPanel, NSCollectionViewDataSource, NSCollectionViewDele
         let layout = collectionView.collectionViewLayout as! CollectionViewCenterFlowLayout
         if uiWorkShouldBeDone { layout.currentScreen = screen }
         if uiWorkShouldBeDone { layout.invalidateLayout() }
-        if uiWorkShouldBeDone { collectionView.setFrameSize(NSSize(width: ThumbnailsPanel.widthMax(screen), height: ThumbnailsPanel.heightMax(screen))) }
+        if uiWorkShouldBeDone { collectionView.setFrameSize(NSSize(width: ThumbnailsPanel.widthMax(screen).rounded(), height: ThumbnailsPanel.heightMax(screen).rounded())) }
         if uiWorkShouldBeDone { collectionView.reloadData() }
         if uiWorkShouldBeDone { collectionView.layoutSubtreeIfNeeded() }
         if uiWorkShouldBeDone { collectionView.setFrameSize(NSSize(width: layout.widestRow!, height: layout.totalHeight!)) }
@@ -108,14 +108,10 @@ class ThumbnailsPanel: NSPanel, NSCollectionViewDataSource, NSCollectionViewDele
     }
 
     static func widthMax(_ screen: NSScreen) -> CGFloat {
-        return floor(screen.frame.width * Preferences.maxScreenUsage - Preferences.windowPadding * 2)
+        return screen.frame.width * Preferences.maxScreenUsage - Preferences.windowPadding * 2
     }
 
     static func heightMax(_ screen: NSScreen) -> CGFloat {
-        return floor(screen.frame.height * Preferences.maxScreenUsage - Preferences.windowPadding * 2)
-    }
-
-    static func heightMin(_ screen: NSScreen) -> CGFloat {
-        return floor(Cell.height(screen) - Preferences.windowPadding * 2)
+        return screen.frame.height * Preferences.maxScreenUsage - Preferences.windowPadding * 2
     }
 }